ds-kv8113-wme1 (b)

I have an indoor and outdoor station, DS-KH9510-WTE1 (B) & DS-KV8113-WME1 (B) respectively and when someone calls, I can see the camera feed in the indoor station however the feeds are never recorded. For calls I pick up, its OK not to have a recording but for calls missed, its difficult to tell...