Windows vista install problem.

[randall]

For some reason, the windows vista install does not recognize my other HD. It works just fine because I am on windows vista right now, but i just want to install the 64 bit version on my new computer.

My bios recognizes both HD's, and even when I set the other one as my primary, the installation still does not recognize.

However, when I unplug the one that install DOES recognize, it simply tells me that I had no hard drives.

what is the problem?