I was typing this in response to the post you made in the other thread, but I'll place it here instead. I think your issue may be due to #1?
I'm experiencing the exact same problem that you are describing. Stalling motors during move commands from 2010 screenset.
I've had 4 users come to me with this issue. It's probably one of two things.
1) If you have a dual core processor, go into the bios and disable either C1E or EIST.
this fixed the issue for 3 people.
2) the 4th user was using an old PC that just wasn't capable of displaying the larger toolpath. Open the task manager and check the CPU usage with g-code loaded. Then turn the toolpath on and off with the toolbar button. The user that had the problem was seeing 90%CPU usage without the machine even running, but only 3% with the toolpath turned off.
If this is the issue you're having, the machine should run smoothly with the toolpath turned off. But you really need a better PC.