I have installed Office Communication Server 2007 Enterprise edition on a 2003 Machine, I have also installed office communicator on client PC for IM which is work fine. When I try to connect to live meeting I get error (An error occurred while trying to create the Meet Now meeting), and will not connect. I don't know if this is a certification issue or I have not setup probably. In the event viewer, I only get this error (ViruScan Enterprise blocked by behavior blocking rule with server ip address.) . Please help.