1.33 thunderbird won't change multiplier???

I have an 1.33 thunderbird (A1333AMS3C)(AXAI0110MPMW)(F3389520418) CPU... All the L1 Bridges have been closed from the factory. my A7S-VM will not let me change the Multiplier. Lists as :shaded: 10x in CMOS. Don't know what else to try??? Maby MOBO not capable of changing Multiplier? maby need to Flash BIOS??? Help please. I unlocked an AMD 900 Athelon years ago by closing the L1 bridges. but these on the 1.33 TBird are already closed???

ya 1.2 t-birds and up are all unlocked... maybe time to flash the bios on your A7S-VM