Your ID is different from your username. Your ID is used by G to determine if the clicks are coming from your account.
Selfspirit, check the ad code generated for your account. You can find your client ID there. Example: <script type="text/javascript"><!-- google_ad_client = "pub-xxxxxxxxxxxxxxxx"; ---> This is your client ID google_ad_width = 728; google_ad_height = 90; google_ad_format = "728x90_as"; ... (snip) Code (markup):