Make sure the switch is on the second page, an example, Switch 1 ON Hero Disappear, and have sprite as nothing. With this, make sure the first page has the switch happen. Example,
Message: [Hero] I WILL get my revenge!!!!
Move Event: [Hero] 3 left etc to edge of screen or something
Switch 1: ON
Another thing I do sometimes is in the move event tab, after selecting directions etc, I make image none, (One of the selections on the right, can't remember what it's called)
Hope this helped.