Merry Christmas/Happy Holidays!

It sounds like the MBR is messed up. Did you ever have grub on this drive, and what
OS was on the drive previously? I'm running 3.4 and I had a chance to make a floppy
I don't know if 3.6 gives you that option but it is a good idea to make a boot floppy when
you're doing the install.

A google search produced this page: http://linuxplanet.com/linuxplanet/tutorials/5361/4/
And at page bottom there is a how-to on re-installing grub from your knoppix live CD.

Good Luck-hope this helps!