I installed a WAP4410N and created 3 SSIDs, each with WEP 128b shared keys. After several hours of working, the WLANs stopped operatings (all clients lose connectivity) and logging into the admin page of the WAP4410N, the WEP settings appear to have been reset. After re-assigning the security keys, the WLANs work again. What could be causing the WAP4410N to lose partial settings like this?