Problem on coupon using

Dear all friends,

i need to setup the coupon operating for POS system. I have created a coupon record and corresponding tender type on Navision. When i clicked “Coupon” button on POS interface and entered the coupon number for coupon calling, the system said “THE COUPON IS NOT VALID IN THIS STORE” and nothing happening afterward.

Would you please advise any comments about this issue? thanks in advanced.