Thanks for your post. Can you please explain in more detail what happened? Does the Advanced Installer window actually pop up over FinalBuilder? Did AI actually run as expected, and if it failed did you see any specific error message? What version of AI are you using? Finally, can you copy and paste the log output from the action and post it up?
I just had a look into this, and it seems the current Advanced installer action is not compatible with Advanced Installed 6.x, as they have changed the command line options enough to break our action. We will probably have to create a new action to work with version AI 6.x. In the mean time you can use the Execute program action, the AI help file does have good examples of how to call it from the command line.