Vista Remember Password and Username for Local Area Connection

Hello!
Just got a new laptop with Vista Home Premium and I want to connect to the
internet through university network (PPPoE with Ethernet cable I think you
would call it).
I did everything as explained here:
http://www.york.ac.uk/services/cserv/net/nas/vista.html
(link might be easier instead of explaining) but everytime I restart
computer it doesn't remember the Enter Credentials in the last step (which
are student username and password from uni). It seems like I just need to
check that "Save this user name and password for future use" but it is
disabled?! Any possibility of checking that thing anyway this so when I start
Vista it makes a connection immediately.
Thanks a lot in advance!
Regards,
Kris