Problem solved... Nothing to do with the DX8, nothing to do with the Orange RXc(as recommended by Horizon)... it was in fact that the manual describes the position of the CX-3x2000 on the left side up-side-up with cables running towards the boom... when looking closely to the software v2.4, it is hard to see, but the cables are towards the front... once changed, the heli was hovering without a hitch... Thank you...