Working with ZCM 10.1. Just getting started. Have control center installed on server 2003. Have an XP workstation with Zenworks agent installed. Workstation appears in Devices, Workstation. Green indicator. Try to start remote session from Zensorks control center. Instant error message: "Failed to connect to server..."

Have read some other messages on this forum. Have the following troubleshooting info:

Firewall is NOT on on the workstation.
Control center computer can ping the workstation, both by IP address and by DNS name.

Don't know where to go next.