I am using Trixx as afterburner refused to work correctly for me. It was saying something about an error when booting. I was having the same issue and two things that I figured out are:
1. Your video out has to come from the graphics card. I was trying to use onboard graphics from my 2500k, but it refused to show the settings for the cards in Catalyst and Trixx.
2. I couldn't get Trixx to show any information before I started Catalyst. I also had to change some of the settings. I have check marks on: Show effective memory clocks, set clocks on change, save fan settings with profile, and disable ULPS.
This may also help you as well:
http://www.overclock.net/t/667144/crossfire-disabling-ulps