[as3] Event Propagation Issue on Stage

Lets say I have two sprites on the stage added with:

DisplayObjectContainer( root ).addChild( sprite1 );
DisplayObjectContainer( root ).addChild( sprite2 );

If I dispatch an event within sprite1, sprite2 doesn’t receive it. Am I missing something obvious here? I’ve read all I can find on AS3 event propagation (including senocalars excelent posts) but cant find a solution.

I understand that events always start at the stage and propagate down to the originator and then back up, but I need it to go back down to the other sprite.

Making sprite2 a child of sprite1 obviously solves the problem by creates a tight coupling.

Ideas?