Dave, you may have a corrupted download file. Re-download the firmware files and try again. GL, Bruce, N1RX > I am using K3 Utility version 1.4.10.11 and KUSB adapter. The K3 is serial > #5253. I get the following message in the K3 Utility: > *DSP1 firmware load failed > Error Code xE2000046 > Version number verification failed*