Backup EXEC 12.5 to Backup ORACLE 9i ERROR

ORACLE 9i in windows 2003; Backup EXEC 12.5

I get the following error messages:



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# -----------------------------------------------------------------
# RMAN command section
# -----------------------------------------------------------------

RUN {
ALLOCATE CHANNEL ch0
     TYPE 'SBT_TAPE';
SEND 'BSA_SERVICE_HOST=192.168.0.1,NBBSA_TOTAL_STREAMS=1,NBBSA_JOB_COOKIE={C9B73B34-A938-4154-8DFB-0DF31EE60845},NBBSA_DB_DEVICE_NAME=Oracle-Win::\\CLUSTER\ORCL';
BACKUP
     INCREMENTAL LEVEL=0
     FORMAT 'BE_U'
     DATABASE FORCE;
BACKUP CURRENT CONTROLFILE
     FORMAT 'BE_U';

RELEASE CHANNEL ch0;
}

connected to target database: ORCL (DBID=1130152652)

using target database controlfile instead of recovery catalog
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of allocate command on ch0 channel at  01/15/2010 15:49:46
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27211: Failed to load Media Management Library

Recovery Manager complete.

Can anyone help me?
HOW TO DO?
         ORACLE 9i in windows 2003; Backup EXEC 12.5