Solved File and Printer Sharing for Microsoft Networks-problem

hi all :D
i use pc sharing-i'ts working fine except one problem:
what ever i do, the V check mark in "File and Printer Sharing for Microsoft Networks"
is unchecked/remain empty after each pc reboot- and i've to manually Check it and click on OK again...
how do i fix that and make "File and Printer Sharing for Microsoft Networks" checked permanently?

(i use private network. server & computer browser Services working.i do not use password protected sharing)

thanks

problem solved:
it was lenovo access connection network security settings fault.
Thanks