Interpro 125

Hello, Some time ago I got a couple of Intergraph Clipper machines. The 2000's are running great now (I even bought extra memory of eBay :), but I'm still having some troubles with my Interpro 125. When I got it, it was without a hard drive. So I put in a scsi drive and tried to restore the OS with the boot floppies. There is a set of 5 floppies and a program in the ROM that asks for DISK 1 trhough 5 for restoring CLIX. This program runs fine, however about halfway (sometimes I got up to disk 4) a 'screensaver' (the sliding intergraph) kicks in and I'm back to the boot-up screen. I've tried turning off the screensaver in the prom, but it still happens :(. Does anyone have an idea what to do or the cause of what is happening? I've tried tapping keys and moving the mouse, but this doesn't seem to help.. greetings, Michiel