SNMPGET PROBLEM

Hi

I have created a custom monitor to one of my ciscos in the OID i have set 1.3.6.1.4.1.9.10.19.1.1.4.0 and when I try to test it it is giving me a result like sysUpTime.6.1.4.1.9.10.19.1.1.4.0:NULL

altough if I do from the Linux Console i get a good result:

snmpget -v2c -c <mycommunity> <myrouterip> 1.3.6.1.4.1.9.10.19.1.1.4.0
SNMPv2-SMI::enterprises.9.10.19.1.1.4.0 = Gauge32: 1

why is it working diffrent on the same server from the Advanet and the CLI and how to fix it?

Thank you.