You have mixed 1066mhz with 1333mhz if you are trying to run 10gb. Though they are supposed to run on the slower rate, they are not always guaranteed to work together, if you are trying to run them together. Also on 32bit windows, more than 4gb wont work.
The specific motherboard(h55m-s2) has only 2 dimm slots so I tried 8gb 2x4 (the new modules I bought which are at 1333Mhz) and nothing happened with Windows boot although the bios recognise them at 1333Mhz speed. I have Win7 64-bit and I also tried to install 32-bit but it keeps doing the same, stuck at "Windows Starting" screen.