Force users to register before seeing page

The specific theme we are using is called Nightlife, a templatic theme, as seen here: [login to view URL] If you click on the button that says "Submit Event," you are immediately taken to the Submit Event page. If you do not have an account, you can register on this screen (it's disabled for the demo, but when enabled, you are allowed to register). However, we do not want users who are not registered or logged in to see this page. This is what we want for this project: • If users are logged in, they can proceed to the Submit Event page after clicking the link • If users are NOT logged in, we want them to be forced to login page. If they are not registered, they will have the opportunity to do so on this page. Files for this theme can be provided. You are to use your own server/computer to test out the functionality we want, note which files you edit/add/update (adding your comments to the file so we can quickly search for them), then forward this info to us when done. We should be able to clearly see whatever new code you find/develop, and add this to own own files to achieve the same functionality. If you have any questions, please contact us! :)