Oracle 10g backup on SunOS 5.10 doesn't work

Hi,

I have a problem with setting up Oracle 10g online backup on SunOS 5.10 SPARC.
Filesystem backups of the client work without any problems, but I can't do the Oracle.
I use the latest module for Oracle and the client 7.4.3 version.
These are the logs listings after group failure:

nsrnmostart.log
nwora_agent_build_send: Exiting.
nwora_set_RMAN_script: Entering.
nwora_set_RMAN_script: Exiting.
nwora_set_RMAN_args: Entering.
nwora_set_RMAN_args: Setting the RMAN args:
msglog '/nsr/applogs/msglog.log' append
send

'NSR_ENV=(NSR_GROUP=UZoracle,NSR_SERVER=ares,NSR_SAVESET_NAME=RMAN:/nsr/res/rman_USOS_full)'
nwora_set_RMAN_args: 2 arguments set.
nwora_set_RMAN_args: Exiting.
cmd_args = msglog '/nsr/applogs/msglog.log' append
cmd_args = send

'NSR_ENV=(NSR_GROUP=UZoracle,NSR_SERVER=ares,NSR_SAVESET_NAME=RMAN:/nsr/res/rman_USOS_full)'
rman_script = /nsr/res/rman_USOS_full
saveset_name = RMAN:/nsr/res/rman_USOS_full
Launching backup process
nwora_run_RMAN: Entering.
nwora_run_RMAN: Writing out the RMAN script.
nwora_run_RMAN: The argv[] is:
/export/home/oracle10/ora10g/bin/rman
msglog '/nsr/applogs/msglog.log' append
send

'NSR_ENV=(NSR_GROUP=UZoracle,NSR_SERVER=ares,NSR_SAVESET_NAME=RMAN:/nsr/res/rman_USOS_full)'
cmdfile
'/nsr/res/rman_USOS_full'
nwora_run_RMAN: The envp is:
nwora_run_RMAN: Spawning the RMAN session.
nwora_spawn_RMAN: Entering.
nwora_spawn_RMAN: Creating the communication pipe.
nwora_spawn_RMAN: Making the pipe non-blocking.
nwora_spawn_RMAN: Spawning the RMAN process.
nwora_spawn_RMAN: Spawned the RMAN process 27516.
nwora_spawn_RMAN: Exiting with an error.
nwora_spawn_RMAN: Exiting.
nwora_run_RMAN: Exiting with an error.
nwora_run_RMAN: Exiting.
The backup process failed:
RMAN exited with return code '1'.
nwora_agent_start_rman: Exiting with an error.
nwora_agent_start_rman: Exiting.
nwora_agent_ss_start: Exiting with an error.
nwora_agent_ss_start: Exiting.
nwora_agent_teardown_fds: Entering.
nwora_agent_load_message: Entering.
nwora_agent_load_message: Exiting.
nwora_agent_teardown_fds: Exiting.
nwora_agent_teardown_jobs: Entering.
nwora_agent_teardown_jobs: Exiting.
nwora_agent_teardown_staging: Entering.
nwora_agent_teardown_staging: Exiting.
Exiting with error:
RMAN exited with return code '1'.
Exiting with return code: -1

msglog.log

RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11> 12> 13> 14> 15> 16> 17> 21 11:05:53 2008

Copyright (c) 1982, 2005, Oracle. All rights reserved.

RMAN> connect target *
2> connect catalog *
3>
4> run {
5> allocate channel ch1 type 'SBT_TAPE';
6> # parms='ENV=(NSR_SERVER=ares,NSR_CLIENT=vega,NSR_NO_MULTIPLEX=TRUE)';
7> send 'NSR_ENV=(NSR_CLIENT=vega,NSR_SERVER=ares,NSR_NO_MULTIPLEX=TRUE)';
8>
9> backup
10> skip inaccessible
11> format '/USOS_full_%d_%U/'
12> tag "Full"
13> (database include current controlfile);
14>
15> release channel ch1;
16> }
17>
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
ORA-12546: TNS:permission denied
Recovery Manager complete.


I've tried to start backups on both the root and oracle users (remote user field) but it still fails with errors (permissions I gues, but I don't know for what)


Does anybody have any ideas how to resolve this?

Thanks!
WS