we started trying to update the cortex firmware and we follow the instruction from http://www.robotc.net/support/vex/WebHelpCortex/index.htm#page=robotc_interface/master_firmware/vex/VEX_2.0_Cortex_-_Download_Master_Firmware.htm
to update our vexnet master firmware. From part 4a - 4c the robot LED on the cortex was solid red while the vexnet and game LED were solid green when we release the config switch. When we try to download the firmware we got a bootloader error. we got the vex cortex at the vex world championship. we try using the vexnet upgrade utility on both windows 7 and windows xp in virtual window mode. we tried two A-A USB cables and the wireless keys.