Catalog Price Rule is Not Working!

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Hi! I have set up a catalog price rule that should apply to a specific group of customers "Wholesale Customers". I have set it up to apply to a certain product category... and basically if anyone purchase 6 or more of anything in that category, they should receive 10% off that portion of their purchase. If they purchase12 or more in the category, they should receive 15% off and 24 or more, 20% off. I have it all set up showing the category, and all attributes that are within that category, but still nothing is showing up when I add the correct quantity to the cart. Can anyone tell me what I might be doing wrong? I am using 1.5.3.1. I have disabled the theme I am using and went to the DEFAULT theme and the problem still exist... so it is not a problem with the theme. I need Help and I need it as soon as possible! Thank you in advance!!!