Thanks everyone for their help,
to adam,
i have tried to save to an aff file but my after effects cs3 always crashes when importing.i thought it was because i was using vista but its the same thing when i try in xp.
i have tried frameserving also with no luck, it imports the file to after effects but no video is shown.
it possible to frame serve from sony 8.0 vegas to premiere pro,so i can just bridge it to after effects since they are so tightly integrated.