I can't get Linux to INSTALL! Help!

[Alexander]

I'd like to apologize for sending out the same question again, but nothing thus far has worked.  Here is my problem, in detail:  I have attempted to install RedHat, TurboLinux, and now I'm on Debian.  None of these have I been able to install.  On every single one of them, as I am doing ANYTHING requiring finding the hard drive, it tells me that there is no hard drive.  This is the error message that I get from Debian:                                                   No Hard Disk! No hard disk drives could be found.  Make sure they are cabled correctly before the system's started.  You may have to change driver settings at the boot,... or load a driver.       I've gotten similar error messages from the other Linux's... I have a 13.5 GB hard drive and it is already partitioned for Linux.  What can I do?  All I want to do is get the thing installed, and I can't even do that... someone please help me!