If you're creating a Custom Search Element that searches your own site:You can create your Custom Search Element from the Web Elements site at www.google.com/webelements/customsearch/. Under "Configure", be sure to select "Search my site and use AdSense for search." In the AdSense Publisher ID field, be sure to enter your unique publisher ID properly (should start with "pub-"). You can learn how to find your publisher ID in our Help Center. If you're creating a Custom Search Element that uses an existing Custom Search Engine: Link your AdSense account to your Custom Search account from the Custom Search control panel as follows: First, go to your search engines at www.google.com/cse/manage/all. Click the "control panel" link for the corresponding Custom Search Engine. In the left-hand navigation bar under "Control panel", click "Make Money". You'll be taken to a page like below where you can link your Custom Search Engine account to your AdSense account. All you need to do is input your AdSense account information.