InCD disables my usb external cd-rw drive

I have a usb2.0 external enclosure. I use it for my lite-on
cd-rw drive. Whenever I installed InCD(or directcd), the external
cd-rw drive can’t work. It reads the disk for a while, then disappears from the hardware list.

If I uninstall InCD, the usb drive works well.

This bug really took me a lot of time to figure out.
Originally I have the full nero with InCD. When I just
bought the usb enclosure, it worked fine with cdrom drive,
but not cd-rw drive. I almost destroyed my whole system,
and finally found it was the effect of InCD(or directcd).

Anybody has any idea to solve this? Thanks.