I am really struggling to be consistent in printing to my HP C510a printer. It seems to be a very confusing printer, but I have had success printing to it. Currently it is getting a wifi signal, and I am able to get on the internet with the zeen, and I have my zeen synched to my printer, but my iPad and my iPhone are not picking it up! What am I doing wrong to be able to connect for a bit, then loose signal??