Ubuntu :: Grub Reports File Not Found

So I got my DOS 6.0 entry in... but Grub reports file not found. I assume grub is fine, and DOS6 was working and I haven't done anything to it. Needless to say, I'm guessing that I'm telling grub to look in the wrong place for the dos bootloader. Here's what I have in my 40_Custom file:

#!/bin/sh
exec tail -n +3 $0
menuentry "MS-DOS 6.0" {
insmod chain
insmod vfat
search --fs-uuid --set 3c34-9666
chainloader +1
}

The "vfat" and uuid of "3c34-9666" were reported by using sudo blkid Do I need to set the root? I thought the uuid took care of that?