Generally speaking, setup of your domain depends on DNS setup functionality provided by your domain registrar and you should contact them for more details.
You have to create (CNAME) www for your DNS servers which points to sites.memberlodge.org
Also, If you want to point not only your www.yourdomain.org but also your main domain yourdomain.org, you have to setup A-record for yourdomain.org to point to our server IP address 216.128.25.34
We also highly recommend to create an SPF record for your domain to
specify that Wild Apricot servers are allowed to send emails on your
behalf.
See for details: http://help.wildapricot.com/display/DOC/Custom+domain+setup
I've also tested your site and it works fine, could you test it from another location?
Denys Zlobin
Helpful Apricot
http://www.wildapricot.com