551 frames rendered on the rendercow pc, so it appears to be working.  However, twice I had to restart the render job from where it left off because for no reason the rendercow pc would say "done" and not take any more frames, even though I had a few thousand still to go. The other odd thing was that I had to redo a single frame within a range but the Vue would not let me do it.  I had to redo something like frame number 425 which was not done because I aborted its render on one of the render PCs. When I specified in the animation window to only render 425 to 425 it would show it was rendering something but it never really did number 425.  When all are done I will revisit and try again.  Maybe you can't just do 1 so next time I will tell it to do 425 to 426.