I could never get the polar drift alignment to work on my 10" LX600. It would slew and search repeatedly, but never finish. I called Luis at Meade about this and he sent me a document (attached) on how to resolve this. The short answer is that the issue is caused by the Starlock narrow angle camera being out of focus. I followed the directions in the document and the polar drift alignment started working for me.
Unfortunately, my house is just tall enough to block the eastern target for the second half of the drift alignment, but at least I was able to get the azimuth alignment done.