multiple conditional formating is not working for excel 2007

[palavi]

Hi all,
i have applied 3 fromulas for the same cells so conditojnal formating is not working for 1 condition.

formula i have given is

$C$12="test1"  then format cells C10:C11

=$C$12="test2"   then format cells C10:C11
=$C$26="NO"

then format cells C10:C11

in these only 2 conditons are working 3rd condition is not working

i can give OR condition is not working for 1st 2..

can anybody help why this is not working

=$C$12=OR(TEST!,TEST2) i9s not working for me ..