Audio in Presenter over Engage file

I have an audio file I am importing in Presenter over an Engage slide (inserted as Engage not HTML or flash).  My final goal is to have the audio play through the entire engage interaction while they are going through it.  I want the blue next button to only light up once the audio has finished playing.  The audio plays just fine, but stops when it sees the Engage interaction as finished time-wise (5 sec/Engage page even though set at interactive/any order).  I extended the time per Engage slide to longer, then changed back again to interactive, and then it plays the entire audio file, but makes the user wait to go to the next Presenter slide until it is finished again.  I tried dividing it out so it went at the same time but no luck.

I am using:

• Restricted setting in Presenter
• Interactive setting in Engage

Any advice would be much appreciated!

Kate