Even though I have changed the batteries I have a great deal of problems getting a signal to the watch. I have moved thestrap all over my chest and get a heart rate ranging from 34 to 240 both impossible as my resting heart rate is around 52. I have liberally used saliva as a lubricant and also ultra sound conductor and still cannot get a correct reading. After I have run about 2km the reading is more or less correct. Help please. Michael bondibnb@bigpond.net.au