flame effect doesn't show in the saved render file
 

hello

I added a fire effect to a nurbe circle object and when I play in maya it works properly and also there is no problem when I render it as a single frame in software render.
but when I render it as multi frame the effect doesn't appear in the rendered AVI file
why it's happening?

thanks

erm im not sure. Might be something to do with particle rendering

??


soz