Hi meike686,
Since you're so close to your Score Goal, it might be that you just have to put a bit more 'detail' into how you take your practice CATs (so that each of those CATs is more representative of what you actually face on Test Day). To that end, I have a few questions about how you took your prior practice CATs:
1) Did you take the ENTIRE CAT each time (including the Essay and IR sections)?
2) Did you take them at home?
3) Did you take them at the same time of day as when you took your Official GMAT?
4) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
5) Did you ever take a CAT more than once? Had you seen any of the questions BEFORE (re: on a prior CAT, in an online forum or in a practice set)?
GMAT assassins aren't born, they're made,
Rich