cisco 2950 logging problem

hello, I have Cisco 2950 Switch.
I need to export events of failed log on event syslog to syslog server.

My running config:

aaa new-model
aaa authorization exec default local
aaa authentication login default local
snmp-server traps enable
snmp-server community public
snmp-server host 192.168.0.5

line vty 0 15
login authentication default
logging synchronous

service timestamps log datetime localtime show-timezone

ip default-gateway 192.168.0.1

when i open the log file about failed logon i get OID string from my Switch.