ACR Rating doesn't shown up in Bridge

Hey guys,

after reinstalling the CS3 Mastercoll. I have several problems I couldn't solve.

First:

I open a bunch of photos(Nikon D700, NEF codec installed)  in ACR 6.4. After some color and rating changings I close ACR.

Next step would be, open the rated pictures but I cant see any rating I made in ACR in Bridge. XMP were created.

Second:

Sometimes NEF Thumbnails, sometimes not. - No Thumbnails in photo-downloader.

I installed the NEF Codec.

Any ideas?