[HELP] Server freezes/hangs

[coles]

Well, I was given a source for me and few school friends/TQ guildies and I've added a bit to it. But after about 20mins of uptime it sorta freezes. It's still playable but monsters don't move or attack, you can't buy anything from shops, you get stuck on Connecting to server. I've added exceptions to anything I could think of but it's not writing any error. Just wondering if anyone had any ideas on what might be causing this. Because I was given this source I'm not sure what source it is. Any help would be nice.

Thanks

EDIT: Forgot to mention that everything still saves to the DB when it's frozen and restarted.

[Real~Death]

wrong section
ask private server questions in the private server section