CS5 writes pixel aspect ratio for output files when I want square pixels

hi,

 

in cs4 when exported frame or preview file, scaled , cropped in output module, resulting file had square pixels, wanted to.

in cs5 output has pixel aspect ratio written in it.

 

 

wmv files exported preview purposes have video size (ar 41:22) , windows media video 9 640x352 (800:429) according media player classic.

 

i want frame , video exported have square pixels.

how can this?

i'm assuming have composition , output settings set square pixels, right?

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