Make sure the filter box is empty so results display, if for instance you accidently have a row of spaces in there, it will filter all channels from the list window, while still showing (in my case) 1650 rooms at the bottom, next try right clicking the title bar at the top of winmx & picking "reset all windows" & if that fails try restarting winmx, asssuming none of that works, ask again, i'd suspect a port forwarding issue if it showed no results, but you say it's getting channels but not displaying them.