Hey all.

As you may know, I run my the internet radio station at my school. In the last few months, we've been having a strange problem--the computer semi-logs itself out at random intervals. It's not a full logout, but the login screen does appear, thereby pausing our iTunes playback, which means our outgoing stream goes silent. It used to be that it would happen every 20-30 minutes, although last night it went HOURS without having this problem. I believe I determined before that the login manager was crashing and that's what was doing it, but I don't remember where to find that log, nor do I know how to fix it. Any help? (I can only work on the computer over our remote desktop system--I have no physical access at this time). Thanks in advance.