CD Drive

I seem to have trouble to get the CD working on my Amiga 1200 which I`m using AmigaOS3.9
When I put the squirrel CD Drive Install disc and click on Install then Click on novice user then proceed than clicked on squirrel SCSI & CD32/CDTV emulator to hard disc than click proceed then it starts working on installation.
Than about to run CD configuration program which everything is switched on and plugged in than click proceed than the device preferences pops up & the squirrelscsi.device is high lighted but the save is ghosted I have click on it but nothing happens. In the device preferences there is no CD drive listed on the right hand side.
Also the CD-Drive has its own power supply. I brought this off E-Bay

@Ant
All sorted thanks