Starcraft 2 - 26/26 missions completed - Can't continue!!!

Hello everyone. I completed all missions and my status says 26/26 missions completed. I had to start the game from the beginning to make the secret mission but it won't let me continue. Can anyone help? Thank you.

 

What do you mean "it won't let me continue"?

 

I mean, shouldn't I be able to continue with Zerg and Protoss missions? When I click continue Campaing I get only the 26/26 missions completed option.

 

The campaign ends after you've completed all the missions...