events page is showing up as not found

My website is

I have installed the events plugin, ensured that my permalinks have the post-name sturcture, and I have no page that is named ‘upcoming-events’ which is the slug I gave the events page.

Despite all this, I am still getting a ‘Not Found’ error when I go to the link for the events page.

I am using a modified version of the Twenty Ten theme.