How do I add a product and promo code to a URL?

[roundabout]

Hey all,

by now i was not able to create a link that ads the product to the cart including a promo code that sets the product value to zero. The very tricky part is to make the link going to the cart view and not initiate check out instantly........

i got that far now: ttp://soeder.XY.com/cart/32833043595367&quantity=1?checkout[reduction_code]=XY

IS THERE ANYTHING WRONG ????

R