So I Purchased a TeamAssociated XP2G transmitter/receiver combo. The receiver is a XP TRS403-sst. After finally getting the dang thing to finally bind, I took it out for a test run. Unfortunately I lose signal at about 20 feet. I have to them walk up to the car and don't get a return of signal until I get a few feet from the car. Any ideas on what's going on? I've checked the antenna and it seems completely intact.