wow… 64 people read this post and nobody answered. I know that it is likely that my question is rather silly but I would be happy for every hint you guys can give me…
Thank you very much Kranthi. That makes a lot of sense now. I was using 2012 Documentation and developed in 2009 (yeah… I know… stupid… but my 2012 vpc crashed and I thought DEV basics should be the same in 2012/2009) :o)