[ Database error ] : عند اضافة الحقول الشخصيه

Database error in vBulletin 3.8.4:

Invalid SQL:
ALTER TABLE userfield ADD field23 MEDIUMTEXT NOT NULL;

MySQL Error : ALTER command denied to user '>>>>_user'@'localhost' for table 'userfield'
Error Number : 1142
Request Date : Saturday, June 25th 2011 @ 03:50:10 AM
Error Date : Saturday, June 25th 2011 @ 03:50:10 AM
Script : http://www.>>>>.net/vb/admincp/profilefield.php?do=update
Referrer : http://www.>>>>.net/vb/admincp/profilefield.php?do=add
IP Address : >>>>
Username : ؟؟؟؟
Classname : vB_Database
MySQL Version : 5.0.92-community





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