FileMaker allows usernames with extended ascii characters (eg dec 246 (ö)). This works fine with the FM13 client. How can I login via php with such usernames? Trying this I get error: Communication Error: (22) The requested URL returned error: 401 Unauthorized - This can be due to an invalid username or password, or if the FMPHP privilege is not enabled for that user. No problems using usernames with a-z and 0-9.