How can you tell if your link is working?

On some products its shows my amount of "hops" under 'my stats' on a product. but on another one i visit my own aff link and no stats yet

Click on your own affiliate link. Then, on the sales page of the offer, click buy it now/order now. You should be on a clickbank order form page. At the VERY bottom of the page you will see affiliate = "yourid". If that matches your id then you will be getting credit for the sales.

What Pana said.

Please note that stats in the marketplace and analytics take several hours (sometimes a day) to update.

Mancar