I don't think I've see momo-vm-win2k3-11 successfully complete a mozmill run. I'm not sure what's up with it, it could be the wrong versions (I've not check), but it either fails or doesn't succeed. I've taken it offline at the moment.
Looks like it was running an older mozmill, I've upgraded to 1.4.2b1 and restarted it. Let's see if it helps