Thanks for you answer, but it didn't work. I followed your instructions exactly!
I installed "both" rokbox plugins:
RokBox system and RokBox content. Are these the ones you meant? There are more than 2 RokBox plugins on the RokBox page...
2. in your template parameters > fetaures > set "login panel" to on and use header-b position
Done! (The login button shows up on the page)
3. in your module manager find "mod_login", publish it, assign it to all pages and set "module position" to "popup"
Done!
But when I click on the button, nothing happens!
www.thrillscience.com/