I have problem when I try to backup my DB on AIX.

I have instance tec with one database name tec.

"Home" for instance tec is /home/tec/.
When I try to backup database to /home/tec/ backup works fine.
But,I want to do backups to /var/spool/Tivoli/backups.
When I try to do backup there,I get this error:
SQL2061N An attempt to access media "/var/spool/Tivoli/backups" is denied
even if I am logged as root.
I can do backup only if I am in home of instance tec.
What I am doing wrong?
Thanx for advice!!!