I'm sorry I have been trying to tell you right a long it wouldn't work. You need 1066 memory. There might be one other thing and I don't think this is it. But check your CPU socket for a bent pin. If everything is OK then you need 1066.
Plus going from DDR-2 to DDR-3 you really not going to see any performance boost. You really want things to run better put in more memory. Putting in faster memory really doesn't do anything for you.