It should not be needed, but which version did you install exactly?[NUT]
Have to unplug the USB cable before the reboot?
After the first reboot it goes into CWM, then do not enter more = /
C6503 10.3.A.0.423_DE - root with toolkit DooMLoRD
when the green LED appears commands Vol UP or Vol down do not work to get into recovery.
thx
Please send me the logs mentioned in the OP about error reporting.
Sent from my C6603 using xda app-developers app