Have you used GUIminer's instant payment button ?
Do you use Windows Sidebar Gadget ?
If the 0.02 payment was sent by you at the site, have you seen the help page that is shown after pressing the payment button ?
UPD: Your screenshot shows that you don't have the entire blockchain downloaded in your client.
You should wait for the number in the status bar to be over 129428 (the block in the table at your link).