rman

Hi, I am trying to backup my database with rman.  I was having rman create a snapshot controlfile in $ORACLE_HOME/dbs directory but found I was running out of space so I changed the parameter to write to '/u99/backup/rman/PROD/snapcf_PROD.f';    When I try to run a backup, it still is creating in the dbs directory even though none of my parms indicate it should write there any more.  How do I get it to stop writing there.  Please advise.


RMAN> show all;

RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION OFF;