SMS v2 with Sp2 Admin

SMS seems to be getting more popular as time goes on, but finding answers to problems is not so easy.
We are having problems with license metering, it wont work! when you set-up the metering of a product which has say six licenses and start the metering, users can not open the software even when they are six licenses for this product.
Any one come across this problem, if so do you no whats wrong?