help: after disk upgrade won't boot

From: Roher N. Clark (change username to rnclark) (username_at_qwest.net)
Date: 12/31/03 

Date: Tue, 30 Dec 2003 22:27:00 -0700

Hi,
I have a dual boot windows xp + red hat linux laptop.
I have a working disk and everything is fine. I upgraded
to larger disk using a tool called copy commander
(boots independently). I've confirmed all partitions
are active and unhidden. When I power up, I just get the
message:

GRUB

and no response. Any idea how to recover?

Thanks
Roger