This is the reason why I requested you to login to the AP itself by entering the command "apciscoshell" in the ME WLC and check whether the AP has an IP.
ME WLC runs independently in AP, the same AP itself running ME WLC will report to ME WLC as an AP. So ME WLC needs 2 IP addresses, one for the ME WLC and another for the AP. The IP which ME WLC will be used only for Management purposes. Anyway it is great to hear that you got your setup working. Have a great day.