I have a I/O magic DVD drive 16X, on 'my computer the E drive is DVD. I select a picture and select 'copy this file' and then select the dvd drive. Next is an error msg that reads 'files on cd-rom are read only'. When I check 'my computer' the drive is now a 'cd-rom'. The disk in the drive is a DVD+RW. How do I correct this problem????