I was in the process of programming several TK-2170 radio's. One of the radios kept saying " Check all connection and communication ports" I kept hitting retry and it finally was able to read the radio. Once I tried to write the program back to the radio it would not write the program back to the radio and was saying "unprog" on the front display. I am using KPG-101D. Out of 6 radios this was the only one that had this issue. Any suggestions on what to do?