User tracking not finding any hosts in Ciscoworks LMS 3.1

Question

L.S.
Our test-configuration is as follows:
Application versions:
Ciscoworks LMS 3.1
Ciscoworks Common Services 3.2.0
Campus Manager 5.1.4
We have 31 managed devices in Campus Manager (data has been collected on all),
Edit: All of them show up green in the topology window.
The device are: 2 6509 cores (running IOS s72033_rp-IPSERVICESK9_WAN-M version 12.2(18)SXF8), 1 ASA firewall (running ASA-OS version 8.0.5) and 29 switches (2960 and 3560 models both running ios version 12.2(52)SE). The switches are connected as follows:
User tracking jobs are running normally, but aren't finding any end-hosts or IP phones at all (I suspect around 250-500 hosts+ on these switches)
We are running SNMP v3 on the switches and have added the following configuration items to all the switches:
snmp-server group readonly v3 auth context vlan-1
<repeat for all present snmp-contexts as shown in show snmp context output>
snmp-server group readonly v3 auth context vlan-83
Debugging is enabled in CM->Admin->Debugging Options->User Tracking Server
This is the UT.log file of the last major acquisition:
messages will remian logged to file: D:\PROGRA~1\CSCOpx\log\ut.log
2010/01/13 14:00:01 main MESSAGE ProcessInitializer: Properties will be read from D:\PROGRA~1\CSCOpx\campus\etc\cwsi\ut.properties
I= 0value *.*.*.*
I= 1value 6
I= 2value 1
2010/01/13 14:00:01 main MESSAGE DBConnection: Created new Database connection [hashCode = 10969598]
PartialOrderNode tree dump: time base = VMPSMajor
<root>
    VMPSMajor: <root>
    VMPSMajor:     VMPSMajor.GetXMLData
    VMPSMajor:         VMPSMajor.PingSweep
    VMPSMajor:         VMPSMajor.PopulateFromDCR
    VMPSMajor:             VMPSMajor.GetPortStatus
    VMPSMajor:                 VMPSMajor.GetBridgeTable
    VMPSMajor:             VMPSMajor.Sweep
    VMPSMajor:                 VMPSMajor.GetIpXlateTable
    VMPSMajor:                 VMPSMajor.GetIpv6XlateTable
    VMPSMajor:                     VMPSMajor.GenerateTable6
    VMPSMajor:                         VMPSMajor.GenerateTable
SMFunction evaluation order: time base = VMPSMajor
  VMPSMajor.GetXMLData  Major
  VMPSMajor.PingSweep  Minor
  VMPSMajor.PopulateFromDCR  Major
  VMPSMajor.GetPortStatus  Minor
  VMPSMajor.Sweep  Major
  VMPSMajor.GetBridgeTable  Minor
  VMPSMajor.GetIpXlateTable  Minor
  VMPSMajor.GetIpv6XlateTable  Minor
  VMPSMajor.GenerateTable6  Major
  VMPSMajor.GenerateTable  Major
Time base VMPSMajor has 5 major nodes and 3 minor traversals.
log4j:ERROR No appenders could be found for category (CTM.common).
log4j:ERROR Please initialize the log4j system properly.
In classlist loader
In classlist loader processing sub classes
updation done
In classlist loader completed
2010/01/13 14:00:03 main MESSAGE DBConnection: Created new Database connection [hashCode = 12524859]
Calling default
Subnet to SubnetData Map Size :73
2010/01/13 14:01:31 DBConnecton-Reaper MESSAGE DBConnection: Closed Database connection [hashCode = 12524859]
2010/01/13 14:01:31 DBConnecton-Reaper MESSAGE DBConnection: Closed Database connection [hashCode = 10969598]
2010/01/13 14:04:50 main MESSAGE DCRDevWrapper: Closing DCRProxy
I'm slowly getting to a dead end here. What am I missing?

Answer 1

Well, our problem was resolved finally through a weird coincendence after having a websession with a Cisco TAC engineer (TAC case SR 613376661)
We changed the
snmp-server group readonly v3 auth context vlan-xxxx
commands in the switches to:
snmp-server group writeonly v3 auth context vlan-xxxx
that is: use the writestring in the snmp-server groups instead of the read string.
After we changed that, all of the User Tracking mysteriously started working.
As far as I know, the writestring should not be needed, but apparently it is....
Is there any explanation for this?