Problem with bluetooth keyboard

As stated before I own a BOXWave bluetooth keyboard which was very useful for typing and portability. However, this last month I have seen some connection issues with it. I'm able to connect it but with in a minute it will disconnect. Sometimes when conected it will type a lletter more than once on the iPhone even though the letters are only pressed only once. I don't belief it's a problem with the battery because I have charged it numerous times for long periods of time. My iPhone is running iOS5.1.1 since I resisted against getting iOS6 for various reasons. I would think that since I haven't updated yet everything should stay the way it was, but then again does anyone know if Apple messed up like it did with the HIMS BrailleSense? If anyone is experiencing this same issue or if anyone knows why this is happening, please post.