External tables error

CREATE TABLE DISKSSPACE
(
  DRIVELETTER  CHAR(1 BYTE),
  DRIVETYPE    VARCHAR2(30 BYTE),
  TOTALSPACE   NUMBER(15),
  FREESPACE    NUMBER(15),
  FILESYSTEM   VARCHAR2(15 BYTE),
  VOLUMELABEL  VARCHAR2(30 BYTE),
  SERIAL       VARCHAR2(30 BYTE)
)
ORGANIZATION EXTERNAL
  (  TYPE ORACLE_LOADER
     DEFAULT DIRECTORY FLATDIR
     ACCESS PARAMETERS 
       ( RECORDS DELIMITED BY NEWLINE
         BADFILE FLATDIR:'DI.bad'
		 logfile FLATDIR:'ext.log'
         FIELDS TERMINATED BY ','
         MISSING FIELD VALUES ARE NULL
         ( DriveLetter,DriveType,TotalSpace,FreeSpace,FileSystem,VolumeLabel,SERIAL
         )
                  )
     LOCATION (FLATDIR:'di.txt')
  )
REJECT LIMIT 0
NOPARALLEL
NOMONITORING;