Roll, Pitch and Yaw values change without stick movement

[Quadcopter]

I have built a Quadcopter 450mm frame, multiwii v2.5 controller, 20A ESCs, Emax 2213 motors, Orangerx R800X DSMX receiver and Orangerx DSM2/DSMX transmitter module in a Turnigy 9XR transmitter. The transmitter is in DSMX mode.

The quadcopter is unstable. This test is done without propellors
When I Arm the quadcopter and set the throttle all motor values should be the same value but they not. I notice that Roll, Pitch and Yaw values change from their 1500 values even though I am not touching any of the sticks. I am assuming because the Roll, Pitch and Yaw move from 1500 this is causing the instability.
Would this be correct?? Should I use a DSM2 receiver instead of the DSMX receiver??

Any help appreciated

[waltr]

Go read the MW Beginner's thread since this is asked by almost every MW beginner it is listed in that thread.