Besides the typo that
Kanji mentioned, if you are still having problems, it might be because you aren't using the right oid notation.
oid's that are fully qualified need to start with a
. so
1.3.6.1.4.1... would be
.1.3.6.1.4.1...Now, not knowing which oid you mean to pull, I can't be of too much help. (On my default install of net-snmp, I can't get that oid to resolve to a name... but that's probably just because I'm missing the MIB that you're pulling from...)