LookUpEdit - Getting whole select object using databinding

Hi,
I have a LookUpEdit that is bound to a BindingList<UserRole> via a BindingSource. Filling the values in the LookUpEdit works properly. The LookUpEdit show a single property from my T objects (the "RoleName" property, see code below).
Now I wanted to bind the "EditValue" property to a variable to find out which UserRoleo object is currently selected (i.e. I want to get the whole object!). So I used the following code ("lueControl" is my LookUpEdit control):
               BindingSource userRoleSource = new BindingSource();
               userRoleSource.DataSource = presenter.UserRoles;
               lueControl.DataBindings.Clear();
               lueControl.Properties.DataSource = userRoleSource;
               lueControl.Properties.DisplayMember = "RoleName";
               lueControl.Properties.Columns.Add(new LookUpColumnInfo("RoleName"));
               lueControl.DataBindings.Add("EditValue", presenter, "SelectedUserRole", false, DataSourceUpdateMode.OnPropertyChanged);
I tried to bind the EditValue to the "SelectedUserRole" property in my presenter object. But whatever I try, it doesn't work. I always get an exception saying that binding to "SelectedUserRole" is not possible.
How must I do the binding so that I can get the whole UserRole object that is currently selected? What type must "SelectedUserRole" have? I tried the type "UserRole" (this is the type of the elements in my BindingList) and I tried the type "Object", but none of them worked.
Thanks for any help!
Best regards,
    Oliver