rman delete failed - did a force

I changed the command to "delete force obsolete" and then it worked.
Getting following error when doing a delete command.  I can not run a 
crosscheck command since we backup the backups via OS to tape and then delete 
the file that rman had created.  Therefore, only the most current backup is on 
disk.  How do I resolve this error?
RMAN> delete noprompt expired backup;
2> delete obsolete;
3> backup as compressed backupset database plus archivelog delete input;
4> exit;
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=58 devtype=DISK
RMAN retention policy will be applied to the command
RMAN retention policy is set to recovery window of 21 days
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type                 Key    Completion Time    Filename/Handle
-------------------- ------ ------------------ --------------------
Backup Set           1      23-APR-09         
  Backup Piece       1      23-APR-09          F:\10G\DATABASE\01KD6Q25_1_1
Backup Set           2      23-APR-09         
  Backup Piece       2      23-APR-09          F:\10G\DATABASE\02KD6Q2E_1_1
Backup Set           3      23-APR-09         
  Backup Piece       3      23-APR-09          F:\10G\DATABASE\03KD6Q2U_1_1
Backup Set           4      23-APR-09         
  Backup Piece       4      23-APR-09          F:\10G\DATABASE\04KD6Q32_1_1
Backup Set           5      23-APR-09         
  Backup Piece       5      23-APR-09          
RMAN-06207: WARNING: 5 objects could not be deleted for DISK channel(s) due
RMAN-06208:          to mismatched status.  Use CROSSCHECK command to fix status
RMAN-06210: List of Mismatched objects
RMAN-06211: ==========================
RMAN-06212:   Object Type   Filename/Handle
RMAN-06213: --------------- ---------------------------------------------------
RMAN-06214: Backup Piece    F:\10G\DATABASE\01KD6Q25_1_1
RMAN-06214: Backup Piece    F:\10G\DATABASE\02KD6Q2E_1_1
RMAN-06214: Backup Piece    F:\10G\DATABASE\03KD6Q2U_1_1
RMAN-06214: Backup Piece    F:\10G\DATABASE\04KD6Q32_1_1
Jeffrey Beckstrom
Database Administrator
Greater Cleveland Regional Transit Authority
1240 W. 6th Street
Cleveland, Ohio 44113

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