Thx for update. I finally could end the episode 4! It was as good as the last ones.
But now, I saw that one Gamerscore was not accepted. It say, that I got 31 of 32 scores, bit if i get inside the list, than it shows me, that I got 32 of 32 scores and that no score is missing. A friend told me, that the score "complete chapter one" is not shown at my gamercard.
So what can I do now?