I had this problem with one of my addons earlier this week, and now it had happened to my others as well.

My root domain is, riverspirits.org

the addons that are not working are...

memphis-attorney.net
memphislegal.com
waggonerlaw.com
memphis-lawyer.net
clumbermonkey.com

What is causing this??????? When this is fixed can I be told the cause for future reference?

Thanks guys.

I should have checked here first before submiting a support ticket.. There is one add-on domain for me working, which was the old one.. I keep on trying to re-addon another domain (one that was bought somewhere else) and it isn't working.. I have it going to the right nameservers. As well, I can't make subdomains.. I get a "cannot connect" or whatever.

Hello.
Your addon domains are working now.

Best regards,
Slavik Koshelev