Hard to tell from the screenshot, maybe rotate it so we can see the full picture?
It looks like there were quite a few "steps" in both the RA and DEC axis, so you could try to back off the worm adjustment to allow for very slight "wobble" on both axis, see this
http://www.cloudynights.com/topic/51...ill-this-work/
The sudden drop off of the RA could be a comms error between the motor and the mother board of the mount (did the whirling sound continue or drop off when this happened?).
Anyway, re-check the connections to make sure the mount motors are responding to commands from the computer/controller.
Then back off the worm tension to allow for some wobble and see how you go.
Bo