selinux newuser problem

[fileuploadoct08]

hi
i m new to selinux. i have installed selinux on my ubuntu hardy8.04 machine. it installed successfully.
now i have created a new linux user and map this user to selinux user using "semanage -a -s "staff_u" newusr" command.
when i run "semanage login -l" command it shows entry of newuser there.
now the problem is,when i restart the machine and use "newusr" for login to xsession it through me error "cannot start the session due to some internal error".as this time selinux is in "enforcing" mode. when i change the mnode to "permissive" then "neusr" is abel to login.
please suggest me if i m missing some steps there.

Errors:
=========================================
Feb 24 18:40:35 ists-desktop kernel: [ 43.408181] audit(1235481035.882:3): avc: denied { entrypoint } for pid=5551 comm="gdm" path="/etc/gdm/Xsession" dev=sda1 ino=3081327 scontext=staff_u:staff_r:staff_t tcontext=system_u:object_r:etc_t tclass=file

Feb 24 18:40:36 ists-desktop kernel: [ 43.916433] audit(1235481036.390:4): avc: denied { setattr } for pid=5551 comm="seahorse-agent" name="orbit-newusr" dev=sda1 ino=3833863 scontext=staff_u:staff_r:staff_t tcontext=system_u:object_rdm_tmp_t tclass=dir

Feb 24 18:40:36 ists-desktop kernel: [ 44.383718] audit(1235481036.858:5): avc: denied { unlink } for pid=5659 comm="gconf-sanity-ch" name="linc-161b-0-5c61989ad21d3" dev=sda1 ino=3833876 scontext=staff_u:staff_r:staff_t tcontext=staff_u:object_rdm_tmp_t tclass=sock_file
==========================================

Thanks

[MikeTbob]

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