IE 11 White Screen

I'm stumped. I have a Captivate file published as SWF/HTML5. Plays fine in Chrome and FF. In IE11, the first two slides play and then the screen goes blank. I can still hear the narration, but can't see or click on anything. I've made sure IE is updated, that Adobe Flash Player is updated and enabled, and tried it with both ActiveX filtering on and off.

Thoughts on what's going on and/or how to resolve it? Thank you!