ClickBank Analytics question

Hello,
I am planning to promote some products with custom domains and LP`s through AdWrods. So the thing is that i want to track my traffic with Google analytics. I discover that CB provide that kind of sales tracking now http://www.clickbank.com/help/account-help/account-tools/integrated-sales-reporting/#ga . Does anybody use this method ?

I use the sales tracking with adwords to see what keywords are converting best, it works for order form impressions, but can't seem to get it to work with sales.