my motherbored has 6 slots for ram

they are in 2 banks on the mb

the first slot in each bank is orange the other 2 purple

looking at it from the top

if the orange slots are filled with 512 cosier ram it works ok

if i fill the other slots with new 512 coiser ram the moniter

wont get a signal ...ie no picture ...

is there a option in the bios i have to enable to ???????

POWER UP THE PURPLE slots .. as they dont seem to work ...

at my wits end ..really pissing me off now ...

and the tech who normally fixes it ..CARNT MEET HIM TILL FRIDAY

soo ive got £150 of ram sitting here doing nothing real tears

ANY IDEAS