Adg24, thank you for your response.

I did another test.
The left hand picture is the input to Premiere Pro (output of Poser5).The right hand picture is the output from Premiere Pro.Please see the picture .The timing of two picture is not same.

Again we have the black outline. We also have other problem areas which I pointed out by yellow lines in the picture.
While I am new to Premiere Pro, this program may have a problem. Or I have to adjust something ?

I did not have this problem when I used Premire6 demo version. Premiere Pro (7) is pretty new version.

The aspect ratio was modified by Premiere.
I also had sound problem which I did not have in Premiere6.