[newbie] Hard drive not found?

[Peter Guzikowski]

Hi   I'm trying to install 7.2 on an AMD Thunderbird with an ASUS A7V mother board. I have a hard drive where 20 out of 30Gb are used for Windows, which is working just fine. I have saved the remaining unpartitioned 10Gb for Linux. When I try to install 7.2 however, I get the following message when I reach the point in the installation program where I'm supposed to partition the hard drive and set up the filesystem: "An error has occured - no valid devices were found on which to create new filesystems. Please check your hardware for the couse of this problem". And then I can't do anything else than just exit the install. I've tried to boot directly from the CD, from a boot disk, I've tried to run text mode install and in expert mode, but nothing works.