additional password dialog CE 5

We ve the following problem. When we switch on the WINCE Security Policy
with additional password settings. The devices are asking to fill in a
password (set a password) all is ok until we reboot (switch off) the
mobile device. When it comes up there is for less then 1 second a password
dialog after that there is a topbar where it shows that the password
screen is showing. Below it is a white screen and there is the possibility
to show the screenkeyboard. I ve to type blind to fill in the password and
then press ok. Then i am in the device. When i press the password wrong or
when i switch off the screenkeyboard or press somewhere in the white
screen then the device is hanging complete.

Info:
Win CE 5
Device HTC tytn
Latest CE 5 zenworks client