LX90 Possible Problem!

Ok, I was out last night with the scope, after the initial setup I decided
to use the Autostar for a look at the Solar System, so as the moon was out I
decided to go there first, problem is that the Autostar displayed slewing
yet the scope wasn't moving, when it had finished I picked another of the
Planets and the same thing happened again, no actual movement, can anyone
explain why? It did slew to other objects, messiers etc that I tried.

TIA

Redman