I have an issue with the Plop Boot Manager...

I am trying to boot to a USB device (with a GRUB boot loader). I have the Plop boot manager CD in the drive and the USB plugged in at the back, and when I select to boot to USB, it throws me a "disk error". The disk is bootable on a motherboard that supports USB booting, but Plops is throwing me this error every time, even on the USB booting supported machine!

Why is this, and how do I fix it.

Cheers!

ATTN: Moderators..
Is this the right place to put this thread in. Plops is practically an OS on a CD, that only focuses on booting devices!