Yep. A new processor or receiver is in your future.
... unless your receiver has 7.1 analog inputs and your source will decode it that is. I don't think too many have this feature but I could be wrong.
Aside from a few audio nuts (whis includes many at this site and others like it), most of the buying public is quite satisfied with 5.1 and, considering my room size and the fact that I must put furniture in it for people, not sound, I'm among them.
How many speakers vcan one place properly in a room and still live there?