Trying to use sd-retrieve-url

I am trying to use the function osi:sd-retrieve-url to get information from an internal asp.net web site (currently on my local computer). However when i make the call (oli:sd-retrieve-url "http://internal/ErpWeb/PartDetails.aspx?PartNumber=222222") the application just hangs, for while, like its timing out. then it returns nil.

Is there someway to trace what is occurring? If I put the link in a browser it works just fine. Does this only work on static html files? Is there some way you could publish the source to the oli:sd-retrieve-url so we could make our own? or at least try to debug what is happening?

Thanks

Rick Jones