Firmware not loading on latest mission planner

Trying to finish of my Ardu 1 finally and have go to stage of uploading firmware, have tried on two different machines and get the same error message in mission planner one machine running XP the other Win 7, leds on board come on and its visible in com port area but when I try to upload firmware the following message appears, Please, does anyone have any ideas whats happening here? Thanks3691056905?profile=original

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