Try the rooftop-to-rooftop with both factory rubber ducks. Double-check that you're both on the same channel, including the A/B setting. Try a different channel. Verify that both units can properly receive (use the NOAA weather frequencies in your area, they should be a good strong signal, although they are VHF). Since you have 3 radios, try the range tests with all three (1 <-> 2, 1 <-> 3, 2 <-> 3). Also swap out the antennas that way to verify, once you know you've got good radios. I've heard horror stories about the build quality of the Baofeng radios. I have a handful of them and so far they have been fine for my needs... but it may be something of a crapshoot.