There seems to be some confusion as to what you are trying to do. If you 
want to perform server-side debugging, you need to use the built-in 
debugger in InterDev, not the MS Script Debugger. The Script Debugger only 
does client-side debugging. (Since VI can also do this, you really don't 
need to use the Script Debugger at all.)

To debug in VI, set a break-point on your script, and press F5. 
Alternatively, you can manually debug an already running page by 
selecting "Attach to Process" from the debug menu, and selecting the 
Server Process. If you select the IE5 process, you can do client-side 
debugging.

There are additional comonents you have to install to make InterDev work 
in server-side debug mode. If you find that it still doesn't work, you 
probably need to install these.