the rams is right but the pc doesn't like it

[borednurse]

hi guys can anyone help?? I've try to upgrade my ram from 2 x 256 to 2 x 512. Every time I switch on the pc with the new ram it runs slowy for about 5 mins then reboots and doesn't load. do i need to change a setting or something I've manage to get it to work with 1 x 256 and 1 x 512

http://support.packardbell.com/uk/item/index.php?i=spec_cosmos&psn=010862120322 (http://support.packardbell.com/uk/item/index.php?i=spec_cosmos&psn=010862120322)

here the link for the detail of my pc the cpu as been upgraded to 2.5 celon

and this the ram I bought


SPECIFICATION :

168PIN Memory
133Mhz
3.3 Volt Module
DIMM (DUAL IN-LINE MEMORY 64 X 4)
Non-ECC, Non-Parity
Unbuffered
High quality
1GB (2 X 512MB)
PC133
168-pin high density memory
Non ECC
Unbuffered
Gold leads
Operating voltage: 3.3V

[Dalo Harkin]

According to the link that you gave the boards does support a maximum of 1GB of RAM - have you changed the setting for the voltage manually in the BIOS as 3.3V is quite high and I would have thought needed doing manually