xmods range problems

[silver 4.6]

alright, this is why i gave up xmods before, but i cant belive i wasted my money on another one when the same problem comes my way.

for the first few days, my range was fine, no problems or glitching..

then the next day, a small amount of glitching, and so on..

now i cant even drive 5 feet away from my controller.

*i have used search, it told me nothing.*

*i have replaced both batteries in the xmod and the controller many times*

*i have not modified any electronic part in my xmod since i bought it*

*i bought my xmod new*

please help, im so frustrated that i wasted my money on this crap if its not going to work.

i work for my money, and it could be going into my real life mustang, but i took a chance, and xmods failed me.