sfimba, I don't check it, but maybe you should edit a file incfiles/classes/functions.php on line 375-385
$rank = array(
0 => '',
1 => '(GMod)',
2 => '(CMod)',
3 => '(FMod)',
4 => '(DMod)',
5 => '(LMod)',
6 => '(Smd)',
7 => '(Adm)',
9 => '(SV!)'
);