MAC clients can not register to task server

Hi Fellows,

I'm using SMP 7.1 with SP2 MP1 latest release. I have NS server on computer A. and i'm running Task service on computer B. Both are in the same domain and subnet.

My windows client do not have any issue communicating with the task server "B" .The MAC client installs the agents successfully but after remaining connected for few minutes are disconnected and status remain NOT connected. I have tried this on MAC 10.6 and MAC 10.7. Both show status as Not connected. The log files on the clients are empty. This is the error i get if i register it manually.

"Error 2182086763 failed to register to task server"

I need some guidance to start troubleshooting.

Asad