Hi Viola,
You have already been helped, but I'll explain publicly for the benefit of any other chapter leaders who would like access to this valuable resource.
Your regular password does not apply for access to the chapter leaders section, although you do have to be signed in before accessing it. Every chapter leader shares the same common password for that sub forum, which is changed every few years.
The CLEX access password is sent out by the chapter relations committee, via periodic email blasts.
Once you enter the CLEX password once, the system sets a cookie and remembers that you are a chapter leader. It should not ask again, for future visits.
Welcome and best regards,
Mike