Not able to Install RHEL 4 on Dell 620

[varun]

Hi All

I know it seems very stupid question...

But really i am struggling to install RHEL 4 on my DELL D 620 Laptop
It stuck on the partitioning part ...It never detects the hard disk..I
installed Ubuntu on the same machine and it worked fine..Windows XP was the
previous OS which i was using on the same laptop

Any suggestions are appreciated.

-- 

regards
varun