I have a SONY DVD RW AW-G540A 1.W0 (ATA). About two weeks I backed up a few of my movies. I had no trouble getting them set to dvd-rom, I believe I went to the Lite-on tab, and clicked "current media" and set that to dvd-rom. Now when I try again, and click change it says "Invalid code operation". I'm using +R's and current media(for DVD+RW media) is the only option that doesnt say "unknown(failed)". Of course thats a problem as I'm using +R and not +RW, but it worked before. Though the current media says +RW it has a current setting" of +R. Why does it say "failed" for every other option under "change for"?