Problem with multiple boot

Hi! I need some urgent help...
I had win98 in a 30gb HD (as Master IDE) and installed=20
another HD (80gb as Slave IDE). In the 80gb HD I installed=20
Win XP Pro. Whenever I boot my system I can choose between=20
the two operative systems (XP and win98). There are no=20
problems so far. But when I had to remove the 30 gb HD with=20
win98, the computer stopped booting... So the problem is=20
the following: I set the 80gb HD with Win XP as Master IDE,=20
but it doesn't boot, it only says "press any key to reboot"=20
and there's no way I can boot the system from the HD with=20
Win XP. I'd really appreciate some help,
thanks.
Mat=EDas.