RMAN DB Connect

Hi all,
I'm trying to make a backup from a database called DBT1 and rman has been configured in own database called RCAT. What I try to do is making backup of the DBT1 database.
I am connecting to the database RCAT and trying to make backup from the DBT1 backup:
rman target / catalog rman/rman@rcat

has created a script to make backup level-0.
The database backuped up is RCAT database. How can make backup from the DBT1 database. Has something to with registration of database or the connecting string I use.

Regards
Hamhey

Instead of using

rman target / catalog rman/rman@rcat

use

rman target sys/password@DB1 catalog rman/rman@rcat.

Read the answers to earlier thread posted.

or..

Code:

---

set oracle_sid DBT1
rman target / catalog rman/rman@rcat

---

Thanks,

//Hamhey