Layer problem in Articulate Storyline

Hi guys,

I wonder if anyone out there has any ideas about this...

I have created an Articulate Storyline course with a number of layers.

I go to publish this and view the finished course.
One of these layers is visible at the start of one slide (lets call this Layer ONE) and has a button.

When I click this button Layer ONE is now hidden and Layer TWO appears

That's all well and good BUT if I click the REFRESH button on the PLAYER at the bottom,Layer ONE (which is supposed to be hidden) appears on top of Layer TWO!!!!

Any ideas on how to solve this?

 

Thanks in advance!