I have a 2007 Dodge Ram 1500. The key fob is having difficulties. When I lock the vehicle and walk away, the key fob works. Then, around 45 seconds later it will no longer work to lock, unlock, or auto start the vehicle. Once I come back to the vehicle and unlock it manually (the alarm sounds) the key fob then suddenly works again. After about 45 seconds it will quit working again. I’ve replaced the batteries, and even gotten a new fob. Don’t know where to go from here.