thats why your drives couldnt work at the same time.
did you install ALL the drivers?
check their website and look for new ones if any.
I decided to buy a dual layer DVD drive the other day to back up various parts of my HDD i turned off the comp, took out the old cd-rw drive an pluged in my new
'Philips dvdr1625k/30' dvd writer drive, first problem is i dont seem to be able to use both that and my older dvd drive at the same time so i'v assumed they were in-compatable and pulled out the power lead for the older drive so it effectivley isnt there.
the problem now is that when i put a disc into my new drive, the disc is recognised and the name comes up (DoW or UT2004 ect) and sometimes the program logo appears but if i try to access the disk a message pops up sayin 'D:/ is not a valid win 32 application.'