TMPGenc Authoring Works 4 sync problem

[deadmort]

I've been using this software for quite some time now. My usual practise when I start a project is to load the mpeg and create a proxy editing file and then load the wav file for the soundtrack.

Just recently I'm find that after a couple of minutes they start going out of sync.

Does anyone have any idea why this might be happening and how I can stop it?

My OS is Windows 7 Ultimate, my video card is a NVIDIA GeForce 7300 LE and I have 3gbs of ram.

Thanks

[Baldrick]

So it worked fine before and not now?

Installed any codec packs or other video software recently?

[deadmort]

All is as it was before except that my hard drive might be a little fuller. I have defragged my system to see if that helped but it didn't.