What version of Prime are you running?
Are you using an MSE, and if so what version? If not, you will need that for any "endpoint" mapping to occur, otherwise it's just AP placements and heatmaps essentially, no endpoint tracking.
If you do have an MSE, what type of licensing do you have? The base license will allow you to track clients, rogue clients, rogue aps, and rfid. If you are wanting to track things detected by the IPS, such as a "Broadcast Probe Request Flood", you would need wIPS licensing, and a proper wIPS profile pushed to your APs to then operate in ELM or MM fashion.
Licensing details here: http://www.cisco.com/c/en/us/support/docs/wireless/aironet-602-officeextend-access-point/117539-technote-mselicense-00.html