Connection Issues

[EMEE]

Whenever I connect to the server I can move around for a couple of seconds but then I get a red error in the top right corner of my screen saying I have a connection error with a countdown for disconnection. Ive played on the server many times before but this has never heppened to me before. However there are a few changes from the last time i logged on like how im playing on a new laptop instead of a pc, Im using a wireless connection instead of an ethernet extender, and im at college using my dorms wifi. If someone could help that would be great because i cant find anything to help on the steam forums. 

Also i was banned the l last time i logged off. Not sure if that matters. 

[Penguin]

I would go ahead and delete GMod and reinstall it. I will also private message you the link on here to remove your addons and everything properly. After that it should work.

[Val3ntyne]

try verifying your game files and doing what Lucky said as well. really the only thing i can think of doing to fix this issue.