Weirdness in 7.2

Greetings all, I'm having some weird behavior: trying to install 7.2 Pro on a 400mhz PII 128meg box with a Sanyo CD-ROM.... when I need to swap disks during install it says "Disk 2 has different release number than Disk 1, please insert correct Disk"... it does this for all Disks after that.... if I do a minimal install I can use YaST2 to install remaining stuff fine... but no matter what I do, I cannot use my root password from within graphical environment... it says "login incorrect" every time.... if I "CTRL-ALT-DEL to close xserver, it works fine, I can su to my hearts delight... i should mention that I have used the 7.2 disks on several other boxes with no probs... any ideas?