I am unable to re-enable bonjour services to view my shared library on my PC from my Mac

I am unable to view my shared music library from my Mac on my PC (running Windows 7). When I check in the sharing preferences, it says "The Bonjour services has been disable. Bonjour is required to share music with others. Please re-enable the service to use this feature." Yet when I check the services in the system configuration, it says that Bonjour is enabled and running. I have also checked in the msconfig and it says Bonjour services are running. I have also performed a complete reinstall of iTunes and that did not help. I'm looking for a solution. Thanks.