I am told these can work with WPA, right now we are using LEAP, but the company that supports our LEAP server software has chosen to not support it anymore so we have 5 APs that we want to move to WPA. I see no option to move to WPA on the APs and I will admit that the APs have not been upgraded since purchase. Is it possible to do this, and do I need to upgrade them from 12.00?