I found what was the problem.
In order for XLRStats to work properly with the alterOps parser you need to do the following:
1. In func-globallogic.php you need to change the following line:$supportedgames = array('cod', 'coduo', 'cod2', 'cod4', 'cod5', 'etpro', 'iourt41', 'smg', 'wop', 'bfbc2', 'moh', 'cod6', 'cod7', 'homefront', 'bf3'); // B3 parsernames
to:
$supportedgames = array('cod', 'coduo', 'cod2', 'cod4', 'cod5', 'etpro', 'iourt41', 'smg', 'wop', 'bfbc2', 'moh', 'cod6', 'cod7', 'alterops', 'homefront', 'bf3'); // B3 parsernames
2: Inside the folder config/ make a copy of the file cod7.php and name it alterops.php.Voila!
In the first step you tell XLRStats to use alterops.php and you add alterOps to the list of the supported games and in the second step you define the alterOps variables (actually coping the cod7 variables) for XLRStats.