You may want verify the SNMP traps under Configuration> Notifications> SNMP Traps. When you edit an item on this page you will notice that you can select from various Notification Templates. These templates contain Info Messages. Info Messages are read-only, but they are basically what you will see reported. Create new Notification Templates or edit existing ones to include the Info Messages you want. Then assign the Notification Template to the SNMP trap.
You can find more information in the Bluesocket vWLAN Administrator's Guide on page 190.
If you continue have issues, you might consider packet captures to see what is being sent by vWLAN or received by your SNMP server.
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