unable to shutdown win7 after login samba PDC

opensuse 11.2
samba 3.4

at first I unable to connect to samba but after change the register (Windows7 - SambaWiki) , I could login and map/access the share drive.

but when I try to shudown/restart/logoff win7 , the screen just stop with windows logo without the shutdown/restart words coming out.

am I doing something wrong or missing something ?:confused:

it is after I map the network drive . if I not map the drive , I can shutdown/restart logoff without any problem

I don’t want to be rude, but IMO this belongs in the Win7 forums. This is not some kind of weird samba behaviour.