Hi my messenger auto shutdown when i start a new conversation, but when i uninstall my messenger plus live, i can start a conversation. can someone help me please? How can i chat with the messenger plus without geting shutdown problem?

Hey I found out where the problem is, it happens when I enable the Tabbed Chatting. but when i disable it, the messenger does not shut down when i start a conversation. however, its getting boring to have several chat window open on the desktop. Please someone help, what should i do to be able to use the Tabbed Chatting without it makes my messenger shutdown?