Thank you for your quick response. I un-/install the new componet but now the frontend do not work.
Under my live work space (Win Server 2003, IIS6) I get a blank page only.
Under my XAMPP test area I get this error:
Parse error: syntax error, unexpected T_ELSE in C:\WEBSERVER\xampp\htdocs\testweb\components\com_joomla_flash_uploader\joomla_flash_uploader.php on line 64
With activated JFU plugin the complete web site do not work.
Error message: Parse error: syntax error, unexpected T_ELSE in C:\WEBSERVER\xampp\htdocs\testweb\plugins\content\joomla_flash_uploader.php on line 104
Hope this helps for debugging.