Invalid SQL

[CFF RA's]

Alright my issue is with the "Avatar Categories Hack" post in the vb2 Modifications. I have requested assistance multiple times within that thread, however, no respose has been forthcoming for for the past several months now. so, now I'm asking the vb.org populous as a whole. Listed below is the issue in question... I would greatly appreciate any assistance with this problem. Thank you.

=========== Database Error Report ================

Database error in vBulletin Control Panel 2.3.7:

Invalid SQL: SELECT * FROM avatar WHERE $where1 AND minimumposts<='$bbuserinfo[posts]' ORDER BY title LIMIT ".($limitlower-1).",$perpage
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 '".($limitlower-1).",$perpage' at line 1

mysql error number: 1064

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