Hey buddy, I've got good news and bad news. First, I have an Axiom 25 that works great with Sonar X2!
Bad news: it's been a little while since I installed it, so I'm afraid I have no tips for you about how to get it up and running. I don't recall any major hassles, though. Point is, it can work just fine. Keep trying ... good luck!
Cheers,
Eddie