When a user completes the registration form and clicks "Send Registration," they get a white page that says "Hacking attempt" at the top. It should take them to back to the site to logon. When I check the Admin /User list, it shows that Joomla accepted the registration, despite the message -- but the user thinks that it hasn't gone through because of the "Hacking Atempt' message.

I am using the lastest version of Joomla and Community Builder (including CB logon module). Any ideas on how I can fix this? Any idea why this happened. My site is not public, so few people know about it Below is a link if you want to see it -- louisvillecardinalsfan.com/cms/

I am launching the site in a few days, so any timely help will be apprecitated. - Rick