We currently have MPA select radios with DES encryption and we are trying to incorporate P7150 scan radios. Since they come with AES encryption capabilities, M/A Com gave me these codes to make them work with what we have: J2R15E05.biz and F6R06K02.dsp. I put these on the radios, loaded the DES key in the Key Admin software, but when I try to load the key it says "The Distribution Set could not be loaded. The following error was reported: Key Loading failed. Unable to read a valid response. Resolve the error and click Load to try again." Does anyone know how to "resolve the error"? Thanks for the help!