iomega cd writer

[Big Al Mac]

i have a iomega cd writer usb and up until lately i could back up disks using Clone cd. it will copy the disc to the hard drive then i freezes up when it writes the lead in.
i have windows me
128mb ram
800mhz processor.
i have tried formating my h/d and reinstalling the prog. but to no avail
i don't have any other cd writing programs installed so it cant be that.
any help would be very much apprieciated.