I had the older Holux receiver and was having a problem with the mPower staying connected to it while walking. It worked well while on the bus ETC. I got a new M-100 and I get a whole lot better accuracy and it connects and gets a fix a lot quicker but while walking it still won't stay connected. I am not walking in an area where there are a lot of tall buildings and we have more clear skys than in most areas. I wear the equipment with the receiver on my right shoulder and the mPower on my left hip. Do you have any idea what might be going on?