Duck-attack

I'm trying to recreate the first castle of Zelda 2, just to figure out how construct works, and I'm having a little problem with getting the controls for Link down right. Every animation plays fine, except for the crouch-attack. It shows the frame very briefly, and then reverts to just crouching.

Can anyone tell what I'm doing wrong?

Here's the cap-file.

http://willhostforfood.com/access.php?fileid=63469

I think all it needs is a "DUCK" is NOT down condition in event number five.

That did it. Thanks.