[Serusers] PROBLEM WHIT MYSQL MODULE.HELP ME!!

[Vincenzo Golia D'Augè]

Hi all,
i'm trying to install SER for the first time for a job at university.
I'm using the distribution Fedora Core 2 and I have found some problems.
This problems come out when I load the modules for MySQL 
support:mysql.so,auth.so,auth_db.so
Asper having loaded this modules when i try to start SER whith the 
command serctl start
it appears the following error:

Starting SER : PID file /var/run/ser.pid does not exist -- SER start failed

Checking the file log /va/log/messages I have found out that the errors 
that I had found trying
to start the program were the following:

Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: Maxfwd module- 
initializing
Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: new_connection(): 
Client does not support authentication protocol requested by server; 
consider upgrading MySQL client
Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: db_init(): Could 
not create a connection
Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: ERROR: auth_db_ver: 
unable to open database connection
Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: 
auth_db:str_fixup(): Error while querying table version
Mar  7 15:51:29 localhost /usr/local/sbin/ser[4288]: ERROR: fix_expr : 
fix_actions error

May any of you help me,please?It is quite urgent.
Thank you.
Hear from you soon.
Vincenzo