I installed the driver for the DFU mode and flip. I run flip and select target devices as atmega32u2 and open usb port, all works fine, flip recognized the dongle.
i load the hex file and hit the run button on the left side and it keep gives me "blank check fail at 0x0000". if i uncheck the blank check, after it program the chip this error msg appear "verify fail at 0x0000".
I tried doing this on a winxp and win7 machine , result is still the same.