CDRWin doesn't recognise my Freecom device (USB) so I assume you have the same problem. This will be down to ASPI not being USB aware. CloneCD does recognise the Freecom device (in my case a reader only) and it doesn't use ASPI.

Download the trial version of CloneCD and see if it recognises your device. If it's the CD-RW-4420, it appears to be supported.