Resolution fufilled, i passed the OCPJWCD exam today with 95%!
But i have to mention that i have a lot of experience in this field. So we ran through the "Heads First Servelts and JSP" Book and i only had to take a deeper look at listeners, custom tags and patterns. Then i worked through my 276 Mockup Questions. Afterwards i made all 276 again as i fast as i could and sorted out only the wrong ones and made them over and over again.
That was a hard week!