wince 6.0 uploading error

hi 
i am installing wince 6.0 on mini2440 64 mb

i have successfully made the image but the problem is that i was unable to
download it in mini2440 board

i have upgrade the superviva and now it says usb host is not connected yet
but it is connected and when i switch to previous u boot the usb works fine


any help

i got the following error when i upload the wince 6.0 image using my old
uboot

*** Downloading UNKNOWN image type ***

ERROR: Checksum failure (expected=0x1eb  computed=0x212)


****** Checksum failure on record 0, ABORT!!! ******

Extract wince image failed, ret = 0