I upgraded to a new Motorguide Xi3 trolling motor. I am having difficulty using the auto MPH feature. When I hit this button, it just goes to my maximum setting and it doesn't seem to even attempt to find a MPH and stay with it. Has anyone else had this issue? I do have it networked to my Lowrance EliteTi 7 fish finder, but even when the fish finder is off, I can't seem to adjust the auto pilot MPH. Thanks!