I too a simular error. My Plextor 24/10/40A worked fine for some time. Now it will work with other burner programs, but not with MicroStudio

. When attempting to write CD it hangs up, locking up the computer until I eject the CD. At that time I get the "Test Unit Ready command failed on device 1:1:0 device contains no disc or is not ready (O4h OOh O2h O2h 3Ah O2h)". What can it be? How can I fix it? The drive appears OK, as it will work with other software. Please advise ASAP.
Thanks.
