User unable to manage the WiSM via the management interface of the controller
These are the observations found for this problem.
WiSM has a built-in security feature which does not allow users on the VLAN that the WiSM is aware of to be able to manage it from the network.
Note: The dynamic VLAN created in the WiSM is only meant for wireless users.
An alternative method is to manage the WiSM via the dynamic interface only (not via the management interface).
Wireless Services Module (WiSM)