Weathericon6 looks to be like LiveClock. It will only work if it is themed for that specific tweak. For Example: If you were to install LiveClock on your iPhone to make the clock icon on the homescreen show the actual time, you would have to enable the "LiveClock Theme" in Glasklart for it to work. I don't think they have themed Weathericon6 in Glasklart. You may be able to request it from them if you email them.