HELP, please...cant edit any usergroup :(

[silver surfer]

I dont know what happened exactly...
But i cant edit any usergroup any more or even create new ones.I had once the MGC chatbox installed, but i uninstalled it 10 days ago and deleted all template and css modifications i made 4 that shout box.
Today i got now this error message as i tried to create and edit a usergroup :

PHP Code:

Database error in vBulletin 3.6.8:
 
Invalid SQL:
UPDATE vbusergroup SET
 
### UPDATE QUERY GENERATED BY fetch_query_sql() ###
    `title` = 'Banned Users',
    `description` = '',
    `usertitle` = 'I did shit and got banned',
    `opentag` = '<span style=\'color:black\'>',
    `closetag` = '',
    `passwordexpires` = '0',
    `passwordhistory` = '0',
    `ispublicgroup` = '0',
    `canoverride` = '0',
    `forumpermissions` = '0',
    `attachlimit` = '1',
    `pmquota` = '0',
    `pmpermissions` = '0',
    `pmsendmax` = '0',
    `calendarpermissions` = '0',
    `wolpermissions` = '0',
    `adminpermissions` = '0',
    `genericpermissions` = '0',
    `genericoptions` = '0',
    `profilepicmaxwidth` = '0',
    `profilepicmaxheight` = '0',
    `profilepicmaxsize` = '0',
    `avatarmaxwidth` = '0',
    `avatarmaxheight` = '0',
    `avatarmaxsize` = '0',
    `signaturepermissions` = '0',
    `sigpicmaxwidth` = '0',
    `sigpicmaxheight` = '0',
    `sigpicmaxsize` = '0',
    `sigmaxrawchars` = '0',
    `sigmaxchars` = '0',
    `sigmaxlines` = '0',
    `sigmaxsizebbcode` = '1',
    `sigmaximages` = '0',
    `Xtvpermissions` = '0',
    `mgccustomusergroupperms` = '0',
    `nbmsgshowchatbox` = '',
    `awardpermissions` = '1',
    `radiotvpermissions` = '0',
    `vbppermissions` = '0',
    `vbp_discountrate` = '0.00000',
    `vbp_paycheckamount` = '0.00000',
    `vbp_secondarycost` = '0.00000',
    `vbp_primarycost` = '0.00000',
    `spoilt_repextra_perms` = '0'
WHERE usergroupid=8;
 
MySQL Error  : Unknown column 'mgccustomusergroupperms' in 'field list'
Error Number : 1054
Date         : Thursday, December 27th 2007 @ 06:21:27 PM
Script       : http://site.com/admincp/usergroup.php?do=update
Referrer     : http://site.com/admincp/usergroup.php?do=edit&usergroupid=8
IP Address   : xxx.xx.xxx.xx
Username     : silver surfer
Classname    : vb_database 


i attached my admincp / usergroup.php if some1 could help me out. I cant figure out why this happen :S

Thank you and a happy new year !

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