|The simple answer you know already, the boot disk is not working.|
Either diag the floppy or consider a new way. Doc's for ghost are online along with flash based tutorials.
If it is only 6, I'd use G4U cd or floppies. They are slower than ghost but they do seem to work with most machines.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10