Many thanks for the answers but even with another computer (PC) and another cable, I was not able to load the new firmware (and the older too). I had this message that I send to elecraft support....
Wait and see... Nicolas, F5HFZ Elecraft KPA Utility Version 1.12.3.12 OS Version 6.1 Build 7601 Windows 7/Windows Server 2008 R2 KPA version ??.??. RS-232 speed 38400 bit/s Sending firmware file C:\Users\Nicolas\AppData\Roaming\Elecraft\KPA Firmware\KPA500FP0118.hex to MCU Retry 1 successful at address 0x000800, 68 fill bytes Retry 1 successful at address 0x000940, 68 fill bytes Retry 1 successful at address 0x000980, 68 fill bytes Retry 1 successful at address 0x0009C0, 68 fill bytes Total number of retries was 4 Highest number of retries for any block was 1 Error code 0xE2000048: No response to poll while synchronizing to buffer boundary MCU verification failed. Reload MCU. Click "Close" to close this window -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA500-Firmware-loading-VERY-long-tp7568315p7568331.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html