Alpha channel edge (AE to FLV)

Hi all...
i'm importing a png sequence into AE
from AE i'm exporting composition directly in FLV and importing into Flash.
PNG has alpha channel.. when inserting into Flash all objects appear with a white edge on alpha channel
All parameters are quite standard (OnVp6, 700 kbps, no audio... )
no filters are applied to AE layers...
tried with render through MOV Animation and then into FLV but nothing changes...
here a screenshot of the problem...
any solution for this problem??
thanks
Ivan

See this post about alpha channels in Flash and FLV files.

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