[eq4me]

Without the exact error message we cant make a prediction. Google is your friend here.
Reading the Forums on your website it seems the trouble started after you rebootet your server? When was the last time you restarted the mysql daemon? Maybe something screwed up yor config since the last restart. Or did you transfer part of your installation to a new disk? See if the mysql file ownerships and flags are still correct.

In case you dont do this yet: I urge you to do at least a daily backup of all relevant data(Database dump and /etc/) to some save place. Maybe to another disk, an USB stick or better to an remote computer.

I am toying with doing an basic howto on EQEmu specific Linux server setup and adminstration but thanks to my current workload that might wait till the next cycle of the multiverse... *sigh*