Using links to another port on the same server

Hello,

I run both apache and IIS on my server. I have apache (running drupal) respond on port 8080 and IIS take 80. From drupal, I would like to have links to content on IIS. I've tried to add a hyperlink to a page with "http://myserver/pageIwant.asp" but drupal converts it to be "pageIwant.asp" which then links as "http://myserver:8080/pageIwant.asp". How do I prevent it from "cleaning up" my links?

Thanks,

Casey