CF-Auto-Root fail on Galaxy gt-i9300 topic

Sorry to say, i tried to root Samsung GT-I9300 with help of Odin and CF-Autoroot, but got similar Messages as glenf (http://forum.xda-developers.com/show....php?t=2202563) and got stuck - no way to reaktivate handy (stockrom) but could manage to activate downloadmode .
<ID:0/004> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
.....
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> recovery.img
<ID:0/004> NAND Write start!!
<ID:0/004> cache.img
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

I used Odin 3.04 and CF-Auto-Root-m0-m0xx-gti9300.tar.md5 .
I rmoved battery to get into download mode again and tried to use Odin with a stockrom - the same effect.

I had a stockversion 4.3 MAX-I9300XXELLA-20130104192229 and thougt it would work to root - as in thread http://forum.xda-developers.com/show...957273&page=63.
Anyone who can help me,Samsung is new to me, i did rooting and custom roms on HTC before, never had problems. I did not find a way out.

Regards Manfred