Theoretically, installing Dreamweaver has nothing to do with what the web server can process. I suppose that it is possible that something else changed between the time that you last worked on ASP through the web server and the install of Dreamweaver.
If you can, you might want to create a restore point, then install the trial again and see if the issue occurs again, but beyond that, I think that you'd need to get in touch with Adobe. I think that they have trial support.
I did find this technote that mentions jscript, but not sure if it is the same issue you're discussing.
