Well the annoying thing is I got so fed up with it not working, and with what I read about this board having compatibility issues with 1066MHz memory I bought a new board today which is meant to be compatible with memory up to 1200MHz. I have fitted the new board and i am having exacly the same issue. I have set the timings manually to Kingston's data sheet (5-5-5-15 2.2v) and I have set everything else in the BIOS manually according to the BIOS guide in the user manual including setting the DRAM frequency to 533MHz and it is still only showing as PC2-6700 DDR2 800MHz so I am thinking maybe it is the memory at fault. The new board is an Asrock so I cant really ask you for your help anymore but I will soldier on with it and if I manage to resolve it I will let you know. I do actually want another 4GB so as my system is running with 8GB so when I get that I will put that in on its own at first and if it runs at the correct speed then I will return these two sticks.
Thanks for your help anyway.