System hang up if FSB change

[Pollock]

I have a completely new config with Asus P4PE mobo, P4 Northwood 2.0A, 256M DDR 2700 Kingston, MSI GTi4200, Seagate Barracuda IV 80G.
Everything works well with a FSB at 100 MHz. However, I would like to overclock but if I change the FSB in the Bios, the system refuses to start again. This happens for any change, i.e. 100 to 101 MHz only.
What is wrong in the config or the bios settings.
Thank you for your help.

[Wiggo]

Check your memory speed and timings as ya maybe pushing your memory to far and the speed and timings of the memory needs to be slowed down before ya go further. ;)
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