coupon not found.please try again

[tornado1979]

hello,

i created a new coupon , i put percentage,value, start date today, expire never and save.
but when i am on checkout and i write down the coupon code , i keep taking the message : 'coupon not found.please try again'

what am i doing wrong? or is it a virtuemart bug?
i use virtuemart 2.0.14.

please help