Reply to VCI 400 and ableton, headphone monitoring

Hey guys,

Need a bit of advice!

I'm using my vci400 as an audio interface while producing in ableton.

Everything is fine coming out of my monitors speakers. However, i would also like to monitor thru my headphones, and can't figure out how to make it work.

There's no sound coming out thru the headphone output of the VCI400.

Is there something else I should be doing??