I want to use Wordpress login rather than Events+ - How can I do this?

Hi,
I am using Events+ on WP4.0.

When a user that is not logged into the system clicks "Im Attending", the plugin directs them to the standard WP login page.

We now have two scenarios
1) If a user has an account, then they can login and the process redirects back to the event page indicating that the person is attending - yippee!!!
2) The problem - if a person is not registered, they then have to click on register. This causes a registration page to appear, and the subsequent redirection back to the events page does not happen. They then have to click on the event again, and register to attend.

Have you come across this before - is there a workround?

Thanks