Do you check firewall policy? its allowed?

First you need check HA connectivity and parameters,  

connect console cable to ap "ap>enableap#conf tap(config)#int bv1ap(config-if)#ip add x.x.x.x x.x.x.xap(config-if)#end

The maximum number of site-to-site VPN tunnels that can be configured on an FTD 2100 device varies depending on the licensing. For example, with the Base license, the maximum number of site-to-site VPN tunnels is 10. With the Threat license, the maxi...