Sync audio and video(VSE) problem

hello everyone!
let me get straight to the point here,
-i am trying to rotoscope(for want of term) a video.
-But the audio and video dont match up.
Let me tell you what im doing.
-i am loading the audio(as a video, i dont know how to make it purely audio)and am using the scrub and sync options.
-so once ive done that i upload the video as a back ground image(so as i can go over it).
-but the problem is that the video seems to be much faster than the audio.the audio seems to have way, way more frames than then video,
how do i sync it?

Thanks very much, hope to have answer soon.