I have interested in CAPWAP feature and I download the open capwap project to make Access Controller (AC) and Wireless Terminal Point (WTP). I had built the AC which used PC and WTP which used Atheros AP. The CAPWAP feature work well when I enabled the CAPWAP that used my own AC and WTP. When I got the Cisco 2106 wireless LAN controller (Cisco WLC), I configured the Cisco WLC to instead my own AC but I got the authorize fail in Cisco WLC side. It seem the Cisco WLC could not recognize the CAPWAP message which sent form my own WTP. I think this issue just need to synchronize the certificate between Cisco WLC and WTP.So I need to replace the Cisco WLC's certificate manually. Does anyone know how to replace the certificate manually with Cisco WLC ?