USB 2.0 Not Working HP Pavillion dv1000

Hi, I have a HP Pavillion dv1000.
I bought a Hitachi 80GB USB Harddrive.
I tried to plugin, but my laptop doesn’t recogonize the plugged Hardware.

But the same is working well with a desktop pc with WinXP with SP2

I have WinXP Home Edition with SP2. What might be the problem?