Rman Error ERROR: Invalid username and/or passworderror writing input to command

 Hi!I have one production database ORA and one RMAN catalog in odher database.

In my Rman i create script 

RMAN> print script PLIKI_ARCH;

printing stored global script: PLIKI_ARCH

{

backup archivelog all delete input;

}

RMAN>

In ORA EM i create JOB type: Rman script:

run { execute global script PLIKI_ARCH;}

but when job started i have error:

ERROR: Invalid username and/or passworderror writing input to command

Job working well in last time but i change password for OS user oracle.

Thanks for help!