Yeah I solved the problem. thanks to JewBacca.. He gave me Chemo's version last version, so that SEO and CCGV work together just fine.
My next problem is:
If I restrict a product in admin for the coupon discount, and try to redeem the coupon in checkout_payment, it works perfectly. But if I add the restricted product and a not retsricted product, the coupon does not redeem the discount from the not-restricted product. As long I have the restricted product in my order, the coupon does not work. It should substract, lets say 20%o, of the not-restricted product(s).
can you help me out on that problem? Or does anyone else even has this problem?
I appreciate any help I can get.