Hey folks. I need some help. I purchased a dB 4LW Wireless Cyclocomputer from Performance Bikes a couple of weeksa ago. I received last Sunday. I read the directions (what littel was there), I have changed both of the batteries, and have only gotten one reading. It showed I was traveling 74 mph for 6/10 of a mile. I have the monitor mounted on the handle bars, and the transmitter on the left fork. Any suggestions?