E-mail Posting Problems

I have set up WordPress on my server and have set up 3 or 4 blogs with corresponding websites. I am trying to get automatic posts using e-mail and I have run into a problem. For some reason it will not post everytime. I have set up a Cron job to have it look every ten minutes to post anything new but it works on and off for all of my sites. The only thing I can think of is when I go to the actual address of my wordpress mail it shows this error: WordPress database error: [You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near ” at line 3. I am not sure what this means or if anybody can help me, but i’d appreciate it.

Thanks

Jeff