front-end submission form not showing

I am using Event Manager and for some reason I cannot get the Front end form to work for vistors to the site. It keeps saying “Unauthorised Access, You do not have the rights to manage this Event.” I have tried to change the User Role settings but I am apparently not doing it right as its not working still.

I am sure it is a simple thing in WordPress I am missing but any help would be great.

The page I need help with: [log in to see the link]