Flash NFS and Gstreamer/Xine

Can someone explain this problem.
If I log in as root a) root has home directory on the box b) sound works with flash
If I log in as a user a) home directory is on a NFS4 server b) sound doesn’t work with flash
If I change the backend to Xine instead of Gstreamer sound now works for flash

This is 11.4 kde 4.6.4.When I have gstreamer the KDE dum dum dum startup noise happens OK and things like amarok also work

Ta

mal