Nero Media Suite volume problem.

Hi, I have installed Nero Smart Start which has installed Nero Media Suite on my laptop. Now i cant get any volume through Windows media player 11 or the Nero Media player. I have check all the volume setings on both media player are up and not muted but still cant get sound.

The volume on the laptop is fine as I still get volume when using Image mixer 1.5 which I use to make films from my camcorder. I have no other media players installed.

Any ideas?
ps This is actually my mothers laptop which she installed Nero on. I dont know wether the is an option to make Nero the default player and some setting to be made during installation which could have caused this problem.

Any help appreciated, thanks