So, when I bought my ftm-400 I installed it into my shack running off my diamond x50 which is about 20 feet in height and Aprs worked fine, I could send and receive perfectly. However I installed it in my car on a diamond k400/diamond nr770hbnmo and now I’m not getting anything on Aprs and I’m still able to hit repeaters on vhf way past where the digipeater is. Any idea what I’m doing wrong?