I have one WCS running 126.96.36.199. Currently there are few WLC's(inturn supporting Cisco 1010 AP's) associated with it which are running 188.8.131.52 and 184.108.40.206. I have one more WLC which is running 220.127.116.11 which is not getting added in WCS. I came to know the reason was WCS is running one revision older firmware. The solution is to upgrade WCS to 4.0 or 5.0, but if i upgrade the same then will WCS support the existing WLC's running 3.2.X.X ? Also if i degrade the 18.104.22.168 WLC to 3.2 then will there be any impact to the connected AP's (Cisco 1010 and 1242AG both running on 22.214.171.124. Please let me know the best solution so that all my WLC's get added to WCS successfully.