MS Project Server Queuing Service Fails to Start

Symptom:
After upgrading Project server 2007 to SP1, MS Office Project Server Event Service and MS Office project Server Queue service cannot start with the following error: The service did not respond to the start or control request in a timely fashion.

Cause:
After using SysInternals tools, I’ve noticed that both processes were trying to connect to http://crl.microsoft.com/. Since my project server machine is behind a firewall, the outgoing HTTP requests were dropped, and the long delay caused the CRL check to time out. Therefore the service control manager reported that the services were taking too long to start.

Solution:
Temporarily allow outgoing HTTP requests for the Project Server Machine.