problem with sending a movie clip

hi,
i have downloaded some movie clips and when i was downloaded the avast scanning had never detected any virusses into it,but when i want to send a movie clip to a e-mail i received always a message from my avast scanner that the mail has infected and can not be sending to the person who i want to…how is it possible that it is infected and not be able to send it?
regards to the avast team,

                            michel.

The best way is to send it to us (preferably the whole mail as EML attachment). There are too many possibilities here so it’s hard to solve your problem with the information you’ve given.

Please send it to support@asw.cz .

Thanks
Vlk