rman 11.2 to rman 10.2.0.4 catalog

Hi all, I have problems with versions of my catalog-database and my target database.
CATALOG DB Version is 10.2.0.4
my new target DB is 11.2.0.1 .
By connecting with RMAN CLIENT 11.2 to catalog-db 10.2.0.4 I have the following failure:
connected to recovery catalog database
PL/SQL package *********.DBMS_RCVCAT version 10.02.00.04 in RCVCAT database is too old

The rman compatibility matrix of oracle 11.2 docu says the following:
target db=11.2
RMAN Client=9.0.1-11.2
CATALOG-DB=10.2.04
CATALOG-Schema=>RMAN-Client

What can I do, when the most of db's in recovery catalog are 10.2.xx ???????????????????????

1. Another RMAN Client Install (How can I do in 11.2)

or

2. dbua 10.2.04 to 11.2 for catalog db
(Have I the guarantee for the other 10.2.xxxx targets?)