Are you trying to flash from a 64 bit Windows system? It's better to do it from a 32 bit OS.

Also, the rootfs image you are using is too old. At least try to use 1.3.

Here are the instructions I have followed many times to flash without a problem, both in Windows XP 32 bit and Ubuntu 32 bit (notice I'm flashing both rootfs and VANILLA, and that will wipe your whole eMMC. If you just want rootfs just flash rootfs):

http://talk.maemo.org/showpost.php?p...94&postcount=7

For a newer rootfs image (and also a VANILLA image, in case you need it) refer to:

http://talk.maemo.org/showthread.php?t=94050

Also, try a different USB port / cable / computer if you continue having problems.