You can see on your homepage a message which looks like this:
"The file: /home/yoursite/public_html/pixels/main1.gif doesn't exist.
Please process your pixels from the Admin section (Look under 'Pixel Admin') "
The image was not processed. It does not exist yet.
You will need to go to the admin section and process the pixels. Click on the 'Process Pixels' link in the admin and hit the 'Process Pixels' button. This needs to be done once for the first time, and then every time after new pixels are approved.