Q: Distributed processing with Compressor 4.2.1

I have question about distributed processing ability of local video or project sent from latest Final Cut Pro.

Here is what I did so far:

1. I've enabled switch for "Allow other computers to processing on my computer" on both machines (iMac and MBP).

2. Added new group in "Shared Computers" and added there both computers.

3. "All Interfaces" selected in "Advanced" configuration.

4. Added local video for transcoding.

5. Added output for task "Video Sharing Services" -> "HD 1080p"

6. Expanded "Process on:" list

7. Only my computer available in the list, group which I created on step #2 is greyed.

Network setup:

1. Apple TimeCapsule

2. iMac on Ethernet (late 2011)

3. MacBook Pro Retina on WiFi (no Ethernet in this model)

Group greyed for Final Cut Pro project as well (when sent from Final Cut Pro).

Is there any known reasons why group is disabled for local filed transcoding? I've tried to find some, but most referenced to Compressor 4.1 which was unable to perform distributed transcoding of Final Cur Pro project, but in my case even simple file can't be transcoded with group.

Best regards,

Sergey Mamontov