I have WLC 526 and AP 521, both are with new firmware(184.108.40.206). AP is registred on wlc. I have created network, it seen by client. But when client try to connect appear waiting for network dialog, and it waits some time and then disappear but client is not connected. I try on 2 PC with win xp win 7, same results. From router I able to ping WLC. Nothing in logs, even clients try to connect network. What it can be ? What debug can make clear what wrong ?