Connection Problem

[soapface]

I get the connection problem whenever I join my server, this happens to my friends as well, we are able to run around for like 5 seconds before it occurs. In the top right hand corner it says it, and it just counts down until 0 and kicks you out the server. Then it says Server is not responding if you try and enter again.
Any ideas on how to fix?

[brian123]

might be a sourcemod plugin ? check ur console ? or take out the last thing u put in and retry it