Donate button broken

[Spin Doctor]

everytime i or a member tries to donate ebux it comes up with a database error.

Database error in vBulletin 3.5.4:

Invalid SQL:

UPDATE user
SET
`vbbux` = `vbbux` + , vbp_history = 'a:1:{i:0;a:7:{s:6:\"itemid\";s:1:\"7\";s:9:\"finalcost\";s:0:\"\";s:8:\"dateline\";i:1148885842;s:7:\"expires\";s:1:\"0\";s:10:\"fromuserid\";s:1:\"1\";s:12:\"fromusername\";s:11:\"Spin Doctor\";s:6:\"reason\";s:3:\"100\";}}'
WHERE userid = '1101';

MySQL 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 ' vbp_history = 'a:1:{i:0;a:7:{s:6:\"itemid\";s:1:\"7\";s:9:\"fin
Error Number : 1064
Date : Monday, May 29th 2006 @ 02:57:22 AM
Script : http://www.hoodplaya.com/forum/vbplaza.php
Referrer : http://www.hoodplaya.com/forum/vbplaza.php?do=donate&userid=1101
IP Address : 211.30.54.126
Username : Spin Doctor
Classname : vb_database

[CMX_CMGSCCC]

What are they entering for the amount to donate?

It appears from above that they are not entering anything, in which case, an error should be given, so I need to know how that error is coming up.

Are u using the latest v1.5.6 version as well?

-CMX