the Drag and Drop needs vmware tools installed, as Woody said, please check the vmware tools got installed correctly.
If the vmware tools works, but the Dnd does not, could you please post you logs here and we can track details:
About how to post log:
Go to Fusion menun-> Help -> Collect Support Information -> Then allow the log collecter completed and attach the 'xx-xx-xx.tgz' file here.