[StickMon]

Are you doing this on a Mac?

I can't remember the exact error I had, but I didn't get NCSExpert to find the cable in "Windows on Windows", running XP in a VM under Win7. I'll admit I didn't try very hard. My ADD kicked in.

I ran INPA/Progman/DIS native in Win7 (well Progman and DIS in the supplied hacked VMWare) without problem.

I was going to suggest uninstalling the driver that came with it, disconnecting it, plugging it back in and see if Windows would detect new hardware and find a driver in the Microsoft database.
The cable would appear to be pretty generic, since I used it successfully with a driver that came from and entirely different USB to RS232 cable.