[Serusers] Starting SER with user rights

[Ladislav Andel]

Hi,
i would like to start and restart SER with common user rights.
if I do /etc/init.d/ser start as user   I get
touch: cannot touch `/var/lock/subsys/ser': Permission denied

The same question would be for starting rtpproxy.

I guess it's through suid but if set suid bit to my ser script (chmod 
u+s ser)
I get the same Permission denied

Could you help me please? Thank you
Ladislav