"No HardDisk drives found" error (blue screen)

I hav a compaq C571NR Notebook with Vista installed on C drive & a recovery Drive D.However i hav followed yor Step 1-'Partition the Drive' & made a new partition E for XP (im using a XP Prof Sp2 bootable Cd)
Now when i boot from Cd i get 3 options namely : ENTER (to install XP) , R (repair XP) & Cancel.Next,on pressing Enter i get another blue screen that gives this error :
"Setup did not find any Hardisk Drives installed.Make sure any drives r powered on & properly connected & that any disk related configuration is correct."
i read the previous posts wherin i encountered ppl with a similar problem & somone suggested "slipstreaming" but i tried doin that(gave the same error) though i alrdy hav the XP bootable Cd with SP2...