issue with snmpwalk

[FFedo]

Hi,

I have a strange issue with snmwpalk.
If I do snmpget on xxx.977.4.3.1.3.1006 I get the following successfull output :

[pre]xxx.977.4.3.1.3.1006 = INTEGER: 206[/pre]

This is what I was excepting for, now I want to look for other snmp addresses Under xxx.977.4.3.1.3.xxxx.

If I do snmpwalk on xxx.977.4.3.1.3 I get the following output :

[pre]xxx.977.4.3.1.3 = INTEGER: 0[/pre]

But I am clearly excepting to walk through all snmp adresses possible for 3.xxxx ...

What is even stranger is this
If I do snmpwalk xxx.977.4.3.1 I get the following output :

[pre]xxx.977.4.3.1 = No Such Object available on this agent at this OID[/pre]

But I am crearly excepting to walk through all snmp adresses possible for 3.1.1.xxxx, 3.1.2.xxxx, 3.1.3.xxxx, 3.1.4.xxxx [...], 3.1.9.xxxx

And If I do snmpwalk on xxx.977 it successfully go through all snmp addresses except xxx.977.4 !
How can snmpwalk go through all adresses except xxx.977.4 despite xxx.977.4 is clearly working (see first command) and this is excacly where I need to look ...

Either I do not anderstand how snmp works or I am doing something wrong.

Thank you in advance if you could help me with this.
FFedo