netrender callbacks

Hi!

I'm trying to install #progress callback to netrender interface:

batchManager = NetRender.GetManager()
batchManager.connect #automatic "255.255.255.0"

 --then call setcallback method

batchManager.setcallback #Progress somefunction

after that, if you call this - batchManager.getcallback #Progress - just to check - it returns undefined!

And when I register some real function with setcallback function it doesn't work, it's not calling that function not during submitting nor in any other operation with backburner.

Does that function work at all? Or should I consider some complicated variable scopes or something like that?

Thank you!