UTL_FILE package

trying to output a file using utl_file package I have created a directory object (windows server) and UTL_FILE.FOPEN in that directory:

CREATE DIRECTORY test AS 'd:\backup\test';
...

DECLARE
file_handle utl_file.file_type;
BEGIN
file_handle := utl_file.fopen ('test', 'file.txt', 'W');
...

the error is the following one: ORA-29280: invalid directory path Received on Fri May 21 2004 - 10:00:09 CDT