MyBB Community Forums

Hi, I've been having this issue for about a month and a half now, give or take. A certain member on my forum keeps getting banned for no reason. I've checked the administration and moderator logs and it's not by a user. Has anyone had this issue and or is this due to a certain plugin? This member is in a custom user group, of my site.
I have the following plugins enabled.

Subforums In Columns (1.0)
Show Additional Group Images (1.0)
Ajax Poll Voting (1.0)
Akismet (1.2.1)
Auto Media (1.1.9)
Donation Page (2.1)
Inline Downloads (1.0)
ezGallery Lite (1.0.7)
Fassim Anti Spam (1.21)
Favicon in address bar (1.0.1)
Fit on Page (2.3)
Form Manager (1.0)
Hello World! (1.0)
HP / MP / EXP Statistics (1.0.0) 
I'm Subscribed (2.0)
JWPlayer MyCode Embed (3.0)
Multiple Registrations Detector (1.1)
MyShoutbox (1.4)
PJIRC Chat (1.2)
Poll on Index (0.3) 	 
Portal Redirect (1.1.0)
Quick Theme! (1.1.2) 
reCAPTCHA Plugin (1.4)
Required Approval (1.0)
Shoutbox (2.2.0)
AJAX Shoutbox (1.0.2)
Skype MyBB! (1.4.1)
Snowstorm (1.2)
Spell Check (1.4.1)
SpiceFuse Shoutbox (1.1 Beta 1)
Spoiler MyCode (1.1)
SR Forum SiteIcon (1.2)
Stop forum spam (1.2)
Thank You/Like System (1.2)
Thanks (3.9)
User Rank Image (1.0)
Users Browsing Thread (1.1)

Yeah, I have a few redundant plugins that do seemingly the same thing. Such as shoutboxes, but it's because I could only get one of them to work and just have yet to delete it from my server. The only plugins that I meant to have that are synonyms to each other are the security plugins. I've had a flood of bots that register just to spam my forums so I installed these, and they seem to work fine.

Could you link to the user in question?

Make sure that are no tasks running which might be causing it to prune or ban.

EDIT: I guess it is askimet if no user actually banned him.

This user gets banned on a regular bases, and for no reason.
http://www.ff6hacking.com/forums/member....le&uid=542

If you have Askimet activated, just either deactivate it or add the user to be excluded from Askimet and see if it happens again.

This is the only plugin i can think of that would do such a thing as it is looking for spam users and sometimes makes a mistake.

Thanks guys. If he gets banned again after following the solutions provided, I'll rage a little inside and come back here with a few more questions. :p