The fifth stage of the "Van Kanigem" Tournaments

I don't understand how to view a battle replay?! I bought a licensed copy of the game – I have the Uplay code (a piece of paper with numbers under the disc). I patched it – the game starts – it says version 1.5. I played a battle – I clicked save. There's a file in the Replays folder. But how do I view it? In the main menu, the "View Replays" option is inactive :( What should I do? And the file is very small, 340KB :o