Connection Refused: Connect

[Plg21]

For some strange reason, about every other server I try to join says "connection refused: connect". It does this on most of my servers including mcsg. Out of what ive searched on the internet, everyone says it is server side. does anyone know what to do?

 

[Qualia]

Flush your dns?

 

[Plg21]

Flush your dns?

And what does that mean?

 

[Qualia]

And what does that mean?

There should be a guide somewhere on the forums..ummm