Cisco WLC 9800 cannot detect APs

@thl-cmk @tosch
i have found the AP entries

snmpwalk -v2c -c public 10.243.252.10 .1.3.6.1.4.1.9.9.513.1.1.1.1.5

SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.28.209.224.121.98.32 = STRING: “AP-xx-07”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.16.192 = STRING: “AP-xx-04”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.35.160 = STRING: “AP-xx-02”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.87.96 = STRING: “AP-xx-01”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.128.192 = STRING: “AP-xx-03”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.136.192 = STRING: “AP-xx-05”
SNMPv2-SMI::enterprises.9.9.513.1.1.1.1.5.228.78.45.55.172.96 = STRING: “AP-xx-06”