Error 8302 (C611)

I have cdj 900 & cdj 2000, 

I have recently 'upgraded' my pc to run windows 7,

and am now using the lastest version of RB.

It seems any new songs I have added to my collection wont play through the ethernet pro link...  but I can play them in RB on my laptop, I can play them through usb on decks....

All my music that isn't new will play through the pro link fine.

Any advice please?