Unfortunately, you are working with custom code. It sounds like whatever you're working on is an asp document that reads in a text file for it's content. If this is the case, you should be able to put the hyperlink right in the text document, and the asp will import the text document and output it as html.
If it doesn't do this, one of two things are happening:
1.) The asp script is specifically weeding out hyperlinks (as a validation).
2.) The code has an error, or is not supposed to read html at all.
In either case, we could better help you if we saw both the text file and the asp page.
Hope this helps.
ksb007's solution should work. Basically what that means is to instead of a hyperlink in the text document, replace it with a <div> element that looks like this: