Rolling on flat floor, rolling down an inclined plane?

When rolling on a flat floor when the velocity at the circumference equals the velocity at the centre of mass the friction stops acting right? SO why does't that happen when it is rolling down an inclined plane? If it is rolling shouldn't the point in contact with the inclined plane be stationary relative to the inclined plane (therefore no friction just like on the flat floor)??

Please explain this to me

:confused: