I have read a couple of threads about getting the Instant Messaging turned on for open source version. I ran this command " zmprov mc default zimbraFeatureIMEnabled TRUE" I restarted Tomcat and then logged out and into zimbra web client. The green bubble for messaging is there, and i can add buddies but we cannot chat. It says they are online but when i or they type anything, the message never gets to its recipient. Can anyone tell me what i am forgetting to do?