Start-up sequence

Where can I find correct start up sequence api calls? I implemented MotionApps on freescale K60.
I call these functions:
ieResult = umplInit (NULL);
ieResult = umplStartMPU ();
iState = umplGetState ();

at this point iState value is 2 (UMPL_RUN), but when I call

inv_get_quaternion(longquat);

I retrieve an incorect value of quaternion, fixed value while I'm moving the sensor.

Thanks

Giovanni

Giovanni