Thanks for thinking to post the paths to the important files. There does seem to be some recurring difficulty with having the styles recognised, although once I got the hang of making sure the styles were selected and highlighted in the 'Available styles:' window before clicking 'OK', it was fairly straight forward. This is the kind of procedure that it might be useful to have a video-cast of to refer to.
Everything looks good to me - apart from the first couple of lines of your test_TEST11.js file.
These look as if they have been changed, at least they don't appear to me to be correct based on my own configuration, or the typical HTML Editor (default advanced custom) configuration.
Your first two lines are:
FCKConfig.XMLFullName = 'TEST';
FCKConfig.XMLFileName = 'TEST.xml';
These would normally appear as:
FCKConfig.XMLFullName = 'Advanced Manager Enabled (custom)';
FCKConfig.XMLFileName = '(custom)';
Your XML path and FileName are already specified three lines from the end of that script. and there isn't (shouldn't) be a TEST.xml file.
So please could you try replacing the first two lines of the test_TEST11.js with the ones I pasted above?