That's your problem is your trying to run different speeds and timing Ram. Mixing and mismatching Ram will only cause you problems.
Your much better off buying matched pairs that are tested to run together.
You should also check with your Mb manufacturer site and download the manual and look up the QVL (Qualified Vendors List) for Ram that has been tested to run at their rated speeds without any problems on your board.
Please also take the time to fill in in your entire system specs here
This way we can look in the lower left hand corner and know what your hardware is.