Custom urlFormat not working for Events

Hi,

By default event items get URLs like this:
localhost/.../my-event

I want them to be like this:
localhost/.../my-event

So without the date and without the calendar in the URL.
For this I went into Administration > Settings > Advanced > Events > Providers > OpenAccessDataProvider > Parameters
There I've added a new parameter called urlFormat and I gave it value /[UrlName]

Then I restarted Sitefinity in different ways:
- clicked "save changes" on user authentication settings
- restarted both site and application pool in IIS

But when I create a new event, it still keeps the old URL format and not the new one.
What am I missing ?