IMO I think it\s he's trying too much to prove himself, and the harder he tries the worse it makes him.
I agree with Shearer, but then again what do I know, I never played the game apart for fun, but I do believe that once he does score it'll lift the burden that he's feeling.
For me I like our 2 german lads, but it will take time for them to integrate into the team, just hope for their sake others see it that way.