Amplitude 3 as a plugin

Hi, first time posting! I know this question has probably been posted here constantly, but ah well... So I downloaded the free Amplitude 3 program, and running it on its own works fine. Then I tried to add it to Sonar X1 LE as a plugin... I followed all the instructions, and it appeared as a plugin, but when trying to use it I was told it hadn't been installed correctly, at which Sonar crashed. What have I messed up?

Thanks! I tried that, but during the scan it told me that the Amplitube 3 plugin was not installed correctly... I guess the best thing to do would be to just reinstall it, but I'm confused because it runs fine on its own (amplitube I mean)

Ok, I've re-installed it, made sure it is properly registered, and made sure both Amplitube and Sonar are on accounts with admin permissions. I'm at the point now where I can find Amplitube with my plugins and add it to an effects bin, but whenever I try to use it, I am told it is "missing or not installed correctly". Again, is still runs fine on its own...

I've made sure I only have one copy of the file, and now the correct file is being scanned. Now, however, as it is doing the scan it warns me that Amplitube 3 is not installed properly and will make the system unstable. If I choose to ignore the message and use it as a plug in, Sonar crashes. I found some other advice that told me to install it as admin, but that hasn't really helped either... 
 
Thanks in advance, I'm sure this is just me being stupid!