Keeping getting a Crash error!

[JordanCraft1]

This is the code:
---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 10/03/13 01:21
Description: Unexpected error

java.lang.ArrayIndexOutOfBoundsException: -1
at ajb.a(SourceFile:111)
at amq.d(SourceFile:536)
at ConnectedTextures.isNeighbour(ConnectedTextures.java:663)
at ConnectedTextures.getConnectedTextureVertical(ConnectedTextures.java:750)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:265)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:198)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:154)
at bbb.k(RenderBlocks.java:2993)
at bbb.b(RenderBlocks.java:7858)
at baj.a(WorldRenderer.java:282)
at bav.a(RenderGlobal.java:1679)
at ban.a(EntityRenderer.java:1553)
at ban.b(EntityRenderer.java:1117)
at net.minecraft.client.Minecraft.J(SourceFile:605)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at ajb.a(SourceFile:111)
at amq.d(SourceFile:536)
at ConnectedTextures.isNeighbour(ConnectedTextures.java:663)
at ConnectedTextures.getConnectedTextureVertical(ConnectedTextures.java:750)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:265)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:198)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:154)
at bbb.k(RenderBlocks.java:2993)
at bbb.b(RenderBlocks.java:7858)
at baj.a(WorldRenderer.java:282)
at bav.a(RenderGlobal.java:1679)
at ban.a(EntityRenderer.java:1553)

-- Affected level --
Details:
Level name: MpServer
All players: 24 total; [ays['JordanCraft1'/4964, l='MpServer', x=2853.49, y=126.54, z=1133.57], bah['Hobolightning101'/4963, l='MpServer', x=2852.59, y=125.00, z=1128.59], bah['causing_damage'/4962, l='MpServer', x=2853.88, y=125.00, z=1123.69], bah['IxAMxGINGER'/4969, l='MpServer', x=2867.53, y=125.00, z=1147.53], bah['DrBites'/4971, l='MpServer', x=2877.53, y=125.00, z=1147.38], bah['paulzzderpro'/4970, l='MpServer', x=2873.00, y=125.00, z=1148.09], bah['__DuBsT3P__'/4967, l='MpServer', x=2859.00, y=125.00, z=1142.00], bah['MinePebble'/4966, l='MpServer', x=2855.91, y=125.00, z=1138.28], bah['lnform'/4968, l='MpServer', x=2862.63, y=126.16, z=1145.53], bah['twighlightsparke'/4959, l='MpServer', x=2862.47, y=125.00, z=1111.50], bah['colino1010'/4961, l='MpServer', x=2855.56, y=125.00, z=1118.53], bah['KimBroz'/4960, l='MpServer', x=2858.50, y=124.63, z=1114.41], bah['MC250JEjMY'/4983, l='MpServer', x=2877.41, y=125.00, z=1109.97], bah['owenH7896'/4958, l='MpServer', x=2867.63, y=125.00, z=1109.94], bah['nickdragon5'/4957, l='MpServer', x=2872.47, y=125.00, z=1108.56], bah['Compounds'/4979, l='MpServer', x=2889.34, y=125.00, z=1118.47], bah['ILOVEMN23'/4980, l='MpServer', x=2886.56, y=125.00, z=1114.41], bah['sky43281'/4981, l='MpServer', x=2882.63, y=125.58, z=1111.41], bah['CaveRaider1'/4976, l='MpServer', x=2891.66, y=125.00, z=1133.44], bah['Secret_Stash'/4977, l='MpServer', x=2893.00, y=125.00, z=1128.41], bah['aaron414p'/4978, l='MpServer', x=2891.09, y=125.00, z=1123.41], bah['Pikachusdead'/4973, l='MpServer', x=2882.50, y=125.00, z=1145.50], bah['MrSunflower'/4975, l='MpServer', x=2889.59, y=125.00, z=1138.59], bah['Superdrue'/4974, l='MpServer', x=2886.41, y=125.00, z=1142.06]]
Chunk stats: MultiplayerChunkCache: 289
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (2872,127,1128), Chunk: (at 8,7,8 in 179,70; contains blocks 2864,0,1120 to 2879,255,1135), Region: (5,2; contains chunks 160,64 to 191,95, blocks 2560,0,1024 to 3071,255,1535)
Level time: 40634681 game time, 40656436 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 47 total; [bah['owenH7896'/4958, l='MpServer', x=2867.63, y=125.00, z=1109.94], bah['twighlightsparke'/4959, l='MpServer', x=2862.47, y=125.00, z=1111.50], bah['nickdragon5'/4957, l='MpServer', x=2872.47, y=125.00, z=1108.56], bah['__DuBsT3P__'/4967, l='MpServer', x=2859.00, y=125.00, z=1142.00], bah['CaveRaider1'/4976, l='MpServer', x=2891.66, y=125.00, z=1133.44], bah['paulzzderpro'/4970, l='MpServer', x=2873.00, y=125.00, z=1148.09], bah['DrBites'/4971, l='MpServer', x=2877.53, y=125.00, z=1147.38], bah['IxAMxGINGER'/4969, l='MpServer', x=2867.53, y=125.00, z=1147.53], bah['ILOVEMN23'/4980, l='MpServer', x=2886.56, y=125.00, z=1114.41], bah['sky43281'/4981, l='MpServer', x=2882.63, y=125.58, z=1111.41], bah['nickdragon5'/4957, l='MpServer', x=2872.47, y=125.00, z=1108.56], bah['lnform'/4968, l='MpServer', x=2862.63, y=126.16, z=1145.53], bah['Compounds'/4979, l='MpServer', x=2889.34, y=125.00, z=1118.47], bah['MinePebble'/4966, l='MpServer', x=2855.91, y=125.00, z=1138.28], bah['Superdrue'/4974, l='MpServer', x=2886.41, y=125.00, z=1142.06], bah['Pikachusdead'/4973, l='MpServer', x=2882.50, y=125.00, z=1145.50], bah['causing_damage'/4962, l='MpServer', x=2853.88, y=125.00, z=1123.69], bah['MrSunflower'/4975, l='MpServer', x=2889.59, y=125.00, z=1138.59], bah['Hobolightning101'/4963, l='MpServer', x=2852.59, y=125.00, z=1128.59], bah['Secret_Stash'/4977, l='MpServer', x=2893.00, y=125.00, z=1128.41], ays['JordanCraft1'/4964, l='MpServer', x=2853.49, y=126.54, z=1133.57], bah['aaron414p'/4978, l='MpServer', x=2891.09, y=125.00, z=1123.41], bah['CaveRaider1'/4976, l='MpServer', x=2891.66, y=125.00, z=1133.44], bah['Secret_Stash'/4977, l='MpServer', x=2893.00, y=125.00, z=1128.41], bah['aaron414p'/4978, l='MpServer', x=2891.09, y=125.00, z=1123.41], bah['Compounds'/4979, l='MpServer', x=2889.34, y=125.00, z=1118.47], bah['ILOVEMN23'/4980, l='MpServer', x=2886.56, y=125.00, z=1114.41], bah['sky43281'/4981, l='MpServer', x=2882.63, y=125.58, z=1111.41], bah['MC250JEjMY'/4983, l='MpServer', x=2877.41, y=125.00, z=1109.97], bah['KimBroz'/4960, l='MpServer', x=2858.50, y=124.63, z=1114.41], bah['colino1010'/4961, l='MpServer', x=2855.56, y=125.00, z=1118.53], bah['owenH7896'/4958, l='MpServer', x=2867.63, y=125.00, z=1109.94], bah['MC250JEjMY'/4983, l='MpServer', x=2877.41, y=125.00, z=1109.97], bah['twighlightsparke'/4959, l='MpServer', x=2862.47, y=125.00, z=1111.50], bah['colino1010'/4961, l='MpServer', x=2855.56, y=125.00, z=1118.53], bah['KimBroz'/4960, l='MpServer', x=2858.50, y=124.63, z=1114.41], bah['Hobolightning101'/4963, l='MpServer', x=2852.59, y=125.00, z=1128.59], bah['causing_damage'/4962, l='MpServer', x=2853.88, y=125.00, z=1123.69], bah['__DuBsT3P__'/4967, l='MpServer', x=2859.00, y=125.00, z=1142.00], bah['MinePebble'/4966, l='MpServer', x=2855.91, y=125.00, z=1138.28], bah['IxAMxGINGER'/4969, l='MpServer', x=2867.53, y=125.00, z=1147.53], bah['lnform'/4968, l='MpServer', x=2862.63, y=126.16, z=1145.53], bah['DrBites'/4971, l='MpServer', x=2877.53, y=125.00, z=1147.38], bah['paulzzderpro'/4970, l='MpServer', x=2873.00, y=125.00, z=1148.09], bah['Pikachusdead'/4973, l='MpServer', x=2882.50, y=125.00, z=1145.50], bah['MrSunflower'/4975, l='MpServer', x=2889.59, y=125.00, z=1138.59], bah['Superdrue'/4974, l='MpServer', x=2886.41, y=125.00, z=1142.06]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(SourceFile:281)
at net.minecraft.client.Minecraft.b(SourceFile:1871)
at net.minecraft.client.Minecraft.run(SourceFile:548)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_17, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 310390232 bytes (296 MB) / 519045120 bytes (495 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 245 (13720 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdates, ...]
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 6570 GL version 4.2.12002 Compatibility Profile Context 9.12.0.0, ATI Technologies Inc.
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Soartex_Fanver.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1816 (101696 bytes; 0 MB) allocated, 26 (1456 bytes; 0 MB) used

What does this mean? It only happens with the texture pack im using which is Sortex Fanver Pack.
It also only happens on MCSG and I can use other texture packs without an issue.

If you know any solutions to this... HEELP