fei,
I just logged in on your site. The drop-down menu looks great and the logout menu item works as I'd expect. When clicked, I'm immediately logged out.
I'm assuming everything in your last post is now fixed, but if you have any other questions regarding the posts above, just let me know.
Thanks again for your feedback and patience. I know you've run into a few issues with our SCLogin module, but you're helping to make it better by letting us know what's working well, and what isn't. Hopefully, it's not too much of a pain for you in the process
Alex