I have 3 radios. 1 is a 51 sl with v4.14 and it connects to pc config 2.10 or 2.12 just fine with cable to usb to laptop. The other 2 radios are 51es sl with v6.14 and 6.16 and im using pc config 2.18 and its seeing the port com but say communication error with connecting. What am i missing or doing wrong.