we have the Call Back Feature installed on our CCM 4.0(1)ES30 for ove a year now and it has always worked fine.
Now it hat ceased working. Whan I press the Call Back Button on our phones (7940/60/70) I get the message "Service not active".
I have restarted the CTI Manager, RIS Data Collector, Database Layer Monitor and Extended funtions services, but no success.
The last thing we changed on the CCM was installing the AutoAttendant feature, but that has not been used yet.
MS/Windows W32.Blaster.Worm could be affect your Cisco CallManager, try this url:
Case Study: Troubleshooting Cisco IP Phone-to-Cisco IOS Gateway Calls :
Case Study: Troubleshooting Intercluster Phone Calls :
Cisco CallManager Troubleshooting Tools :