If it is still looking for the php file after changing the fckconfig.js to:
var _FileBrowserLanguage = 'asp' ;
var _QuickUploadLanguage = 'asp' ;
make sure the browser is not caching the old files. Try doing a hard refresh, for Firefox this is ctrl+F5 or use a different browser.
The Error message says:
Variable undefined: 'Tuue'
it would seam in the config.asp file you entered:
ConfigIsEnabled = Tuue
instead of :
ConfigIsEnabled = True