No alpha when using Trails effect

[ronin]

Hi guys,

I've got some swf files piano-style on the top layer of a composition. When triggered off with no layer effects there is transparency around the object on the canvas but when I put my desired Trails effect on that layer the transparency doesn't work and instead I get a black background to my Flash files when they are triggered.
This is in version 3.1.3... any ideas?

Thanks,
Ronin

[edwin]

I'm afraid the Trails doesn't preserve the alpha channel. I just had a look and the texture used for the Trails does not contain an alpha channel. Consider it fixed for the next version.