Shoutbox

As far as I can tell, Plus! doesn't actually hook the connection, just the windows. So if you try to send an auto-message then Plus sets the conversation as Active (ie, brings it to the foreground and minimises your game) uses the Windows API's SendKeys to "type" the message, and then returns the original window to the foreground.

Certain applications, particularly those using DirectX (ie games) don't like being alt-tabbed, and may crash under these circumstances.

If you're not using auto-messages (I can't really tell, sorry), then I don't know what's wrong.