Terrible Static during Transitions in Nerovison Express

Hi, I have been making backups of digital camera movies with Nero for a couple of years now and all has been fine. However I have found that when I insert some of the basic video transitions available in Nerovison Express (ver 3.1.025) that at that precise point in the video, there is a shocking sound static laid down in the video as well. I have done some testing and the sound static is also present on the final product.

I have a Audigy2 ZS soundcard with the latests drivers. any help appreciated.

(ihave tried installing the latest MS codecs to no avail)