ASIO NOT active

I recently purchased a Behringer U-phoria404hd 4 channel USB interface and I tested it our using Reaper and Tracktion 4 software and all 4 channel are enabled and everthing works fine. However, having used Adobe Audtion 1.5 for more years than I can recall ( which only allows me to use 2 channels), I would love to upgrade to Audition CC as the user interface looks much the same and I'd be happy using  Adobe.

I've downloaded the Adobe CC software, but when I try and setup the sound card it only shows 2 channel (not 4) and when I click on the UMC setting panel it shows ASIO not active. I've tried ASIO4all  without success and  I'm running out of ideas as it all works on other 2 third party DAWs.

Any help would be appreciated.

Regards

Geoff