utl_file.fremove() Error please suggest

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SQL

Oracle

Hi
I created with the full access to the Folder but it's showing error i don't know where is the mistake.Please anyone can explain.

create or replace directory Utl_fileoption
as
'd:\jk1';

DECLARE 
  filepath VARCHAR2(32767); 
  F1 UTL_FILE.FILE_TYPE; 
  Location1 Varchar(500);
  Begin
  Location1:='Utl_fileoption';
  filepath:='jk.xls';
  --UTL_FILE.FRENAME('Utl_fileoption','jk.xls','Utl_fileoption1','kj.xls',TRUE);
   UTL_FILE.FREMOVE(Location1,filepath);
  DBMS_OUTPUT.PUT_LINE('FINISHED');
  END;

Error report -
ORA-29280: invalid directory path
ORA-06512: at "SYS.UTL_FILE", line 251
ORA-06512: at "SYS.UTL_FILE", line 1230
ORA-06512: at line 9
29280. 00000 - "invalid directory path"
*Cause: A corresponding directory object does not exist.
*Action: Correct the directory object parameter, or create a corresponding
directory object with the CREATE DIRECTORY command.