Ok the latest, I got a program for the CRT SS6900 version 6. Hooked up the AT5555 today and did the program without a hitch. So I guess even though the board says version 5 on the Anytone it needs version 6 software to program, all is good here. I am impressed with the all around operation of the radio, you can adjust the mic gain through the front panel, recieve and transmit are really great and the one I have does just 50 watts on SSB. I will say it is no Yeticom Optima but for 200 dollars it sure is a good second place finisher. The Optima is the best all around radio I have ever used and I am 58 years old, been using the Optima in the mobile talking skip all around the world with it's 55 watt output so the Optima is GREAT but the AT 5555 works very well but is no Optima