snmpwalk didn't show all values!

Hi All,

Guys, I need your help.  I configured out SNMP Agent to execute script.


For example:
###########################################################################
# SECTION: Extending the Agent
#
#   You can extend the snmp agent to have it return information
#   that you yourself define.

# exec: run a simple command using exec()
#   arguments:  [oid] name /path/to/executable arguments
rocommunity public

exec  .1.3.6.1.4.1.2021.2789.51 SERs /opt/snmp/scripts/ser.sh
############################################################################

Then I am trying to run command "snmpwalk".

#snmpwalk -c public -v 1 localhost .1.3.6.1.4.1.2021.2789.51

The output from this command should show me more than 50 values but it
shows only 19 values.

How can I get all output from the script - "ser.sh" which SNMP Agent
execute?

Thanks,
Askar