Adobe After Effects 6.5 Question

Alright, after reading Extazy's tutorial about the masking thing I wanted to try this and I am having a few problems. Please help.

First off, When I go to "Compositon" and then "New Composition" I get this:
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I hit "OK" And everything looks just like his:
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I Imported my "test", "test2", and "test3" videos and put them on the timeline but I have a problem.
How am I going to use the pen tool and slice out the guy from test2 to put on test if I can't even see the whole video? It like, Cut's almost all the video out.
Look:
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I then went back to the start and changed the size from 320 to 640 and it seemed to be alright. Just wanted to clear that part up and make sure I was doing it right. Anyway, Now I have everything cut and it looks alright.
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Now that I went and edited all the stuff out using Sony Vegas, All I really needed to do was put these 3 videos together and save so I go to "File>Export." Then I noticed there was no MPG,WMV or anything so I had to use AVI which wasen't much of a problem until here.

What the hell do I select so the video doesn't turn out so shitty? I tried messing around with everything. When I just export and leave it the way it is, The quality is horrible, Sound skips, and the video sometimes skips. I messed with it a few and got some to not skip but quality is horrible. Can't I get it back to full quality?

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Also, Everytime When I do export the video, It is only 300 frames and it's always like 5 seconds long when It should be WAY longer than that. How do I get the whole video to export with good quality?


I'm sorry but I tried to explain the best I could. Help ex you can.

ok ive toyed with ae a bit and I cant minutly help you.

you see the duration? its set at 10 seconds.
http://img439.imageshack.us/img439/3865/pic19wq.jpg

the zoom/size needs adjusted so it will fit the screen. I forget how. but u worked it out.

as for quality, could be your codecs? or vegas and ae .avi's arent compatible, I have no idea.

Don't export, just do Composition > Make Move > Render...

<3 u and Duran.

You guys helped me out.