Thanks for responding!
Sorry, my system info was wrong. My actual version of virtuemart is 3.0.16.
I updated joomla and virtuemart to test if there where any changes by updating, but no, just lost some config, so now im back at 3.0.16.
Mmm no, nothing to do with spelling, i copy/pasted the coupon name to make sure.
I think it's some configuration im missing. Any ideas?
Thanks