2nd HDD not recognised

I have Asus S478 Intel 845PE ATX A L R board with P4 2.66 512kb S478
processor,
its a new system with new hard drive 60gg maxtor,

I am trying to get my other hard drive a 120 gig maxtor, both ata 133 not
very old as a slave,
on the slaved hard drive is data relevant to my old system so I obviously
cant have it as master, it is not recognised in win explorer so I cannot
transfer data before I format it to the new system, although it is
recognised in devcice manager as working ok.
the intel application accelerator which came with the board says it is only
a 30 gig hard drive.

I have tried to install this drive as master, booting from windows cd to
reinstall, but will not even boot from it.

any help here would be greatly appreciated , other wise I have a 120 gig 2
months old hdd that is wasted

Thanks

Dave