Any ad link that you get from within your AvantLink affiliate account interface is properly encoded to track back to your account. If you would like to confirm, look for the "pw" parameter in your ad link. The "pw" parameter contains your affiliate website ID. To verify that the value of the "pw" parameter matches one of your websites IDs, you can look on the Edit Websites page.
Also, to test if clicks are being tracked properly, you can click on the link on your affiliate website and then look for a corresponding click statistic to show up in your reporting. Keep in mind that reporting can be 5 - 10 minutes behind real time.