voucher codes not working

i send i voucher to myselve but the code that created not working, says "Warning: Coupon is either invalid, expired or reached its limit"

is a expiry date field?

please help if anyone knows

i have 1.5.1

can anyone knows?

go to orders and set the order status to complete, then try it.

D

I was surprised to realize the coupon codes are case sensitive. I was getting the message a lot.

I have the same problem!

is there a way of changing them to non-case-sensitive?
a lot of my clients cant use them because they dont try capital letters.