Change User Group By post Count

[wolfe]

right i also what it ot change usertitile when it gets 10 posts i have tried adding this

if($bbuserinfo[posts] == 10 AND $bbuserinfo[usergroupid]== 2 AND $bbuserinfo[usertitle] == Trial Member<br><img src="http://www.s2k2.com/forums/images/0stars.gif">) {
  $DB_site->query("UPDATE user SET usergroupid='10' WHERE userid='$bbuserinfo[userid]'");
  $DB_site->query("UPDATE user SET usertitle='1' WHERE usertitle='$bbuserinfo[usertitle]'");
}

what else do i add