Hay all, thanks for reviewing my issue. I've look through the threads and didn't see this (particular) problem.
At the risk of sounding ignorant, so be it, but I'm not sure of the order of things. (Who does what - Joomla or Disqus.)
I applied the login module from Joomla. I'm not sure if I should have, but the visible discuss platform on my site doesn't show a place to login. A white, posting block will appear when you click the link '1 posting', but I don't think a user would search that hard.
When I try to login, through the Joomla login module on the public page, I get a white page that reads, Invalid Token. However, when I hit return, the user appears to be signed on, but cannot post.
I've been reading and trying to figure this out for a few days now.
Thanks for reading.