System Audio and Game Video asynchron

[BuffPrime]

Hey Guys,

My English is not so good, so please excuse this^^

I have the following problem:
I record a game ca. 5 minutes and when I look at the video after that, I notice that Audio and Video are asynchron... The sound comes ca. 5 seconds later than the video.
I checked all my settings: system audio: PCM 44100hz, 16bit, stereo; microphone audio: PCM 44100hz, 16bit, mono;
In the sound settings of my Win7 Notebook the settings are also the same. The video codec I use is Lagarith Lossless Codec.
The settings there are:

• Multithreading; YV12;
  
  I don't know how to fix it, I'm going crazy I updated the audio driver, but nothing changed.
  
  Can someone help me?
  
  Thanks for your answers (: