How to Integrate Adsense in Drupal 5.x

Hello Webmaster and Experts

I'm using drupal 5.x and installed a module that support adsense in drupal, as far as adsense module is concerned it is working quite better. I want to integrate google-adsense ads in navigation (left and right). I went through all procedure of building adsense in drupal and get them configured in "block" . after doing work on that I've seen a rectangular ad in my left navigation but without text or image... My question is that how can I display proper ads on my website that will contain text or image ad... if you want to see what I've done there please see and help me out... hope you understand my question http://www.freeseosemtraining.com/seo-sem-products

Thanks

Bilal