I have an AVX. Make sure under the hand control menu system that tracking is turned on. Menu, Tracking. Set to Eq North (or South).
In ASIAir Preview in the slew arrows area you can turn Tracking On (green) or Off (red).
Make sure you are in focus.
After polar aligning slew to a random part of the northwest sky, plate solve and sync to mount. Slew to random part of the northeast sky and plate solve and sync to mount.
Got to a star to final focus and to test Go To. The mount should move to the target, plate solve successfully, back off a little then return, plate solve and show centered.
Good luck.