[Serusers] strange problem ..... /tmp/mysql.sock and /var/lib/mysql/mysql.sock

Hi, all I install mysql server and SER in my FC6 when I run SER with mysql to do authenticate #ser -f auth-mysql.cfg (the SER getting started example) it prompt me that can't connect to local MySQL server through socket 'tmp/mysql.sock' so I modified the /etc/my.cnf' file to change socket=/tmp/mysql.sock but when i start SER and use serctl to add a user ERROR 2002 (HY000): Can't connect to local MySQL server through socke 'var/lib/mysql/mysql.sock' was prompted I don't know if I could open two sock at the same time or how can I let SER or serctr chage the path to fit another. Did someone can show me some clue or solution? thanks!!