When I use ASIO4All in ableton, it won't let computer audio play in my headphones.

I've had ASIO4ALL installed on my laptop for a while now, used it mostly in Traktor. I recently just tried it in Ableton and realized I can get crazy low latency using it instead of the MME or w/e driver I was using before.

But I have one problem right now. On my HP laptop, when I try to play a song in itunes or something with ableton open. It refuses to play though my headphones. It instead plays through my computer speakers. It will play through my headphones once I close Ableton. But this is realllllly annoying.

Does anyone know how to fix this? Thank you.