I just used one of these - the one for 10% off - it worked fine!

$10 off $50 - CATLSP051050
$5 off $50 - CATLSP050550
$15 off $100 - CATLSP051500
10% off (Max. $25 discount) - CATLSP051025

These are good through July 15, 2005, and are good for one coupon use per person.