I need help with running Diablo 2 on Daemon

[Posco]

I first used Virtual CD to make a .fcd file of my Diablo 2 Play Disk. Then I used CDMage to convert that file into a .iso file. I ran the Daemon Tools' Program and set emulation to Securom and then loaded the .iso file into the PHANTOM CD drive. When I clicked Play Diablo 2 it said it needed me to insert the play disk. Can anyone tell me what I doing wrong so I can get this thing to work, please help! thx.