SNMP V2 error on VMWARE ESXi 5.1

Hi Folks,

I have enabled SNMP v2 & V3 on my VMWare ESXi 5.1 with the hslep of esxcli  system snmp set command. Now I do not know which version version works. How do i disable the v3 as I only want the v2  to be enabled. When ever I give the snmpwalk command on a remote host I get an Time Out error.

I also get the the time Out error on the lOcal host.  Also Please help me find the MIB files path

I am new to SNMP Please help!!

Below is the output

esxcli system snmp get

   Authentication: MD5

   Communities: public

   Enable: true

   Engineid: 00000063000000a1c61363a2

   Hwsrc: indications

   Loglevel: debug

   Notraps:

   Port: 161

   Privacy: none

   Remoteusers:

   Syscontact:

   Syslocation:

   Targets: XX.XX.XX.XX@161 public

   Users: sks/-/-/none

   V3targets: XX.XX.XX.XX@162 sks none trap