Rafael,
This is expected behavior. The WLC does not answer if you are on the same subnet as a dynamic interface, by default. You can issue the command config network mgmt-via-dynamic-interface enable, to allow this.
Now, if you're saying that you can't access the WLC from another VLAN that is not also a dynamic interface, I would check teh gateway to make sure it/they have routes to appropriate networks.
HTH,
Steve
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