fortigate 90D interface 2 and onward

Dear sir,

If I connect the interface 2 (port 2) to a switch with POE and inside switch if i connect an wireless access point everything works fine and i can ping the ip of access point also i can do web manage the access points with one access points, but the moment i connect 2nd access points. I cannot ping the 1st access points as well as i cannot connect with browser for managing the access points. And so on. That is at time only one access point attach to the switch connected to interface 2 can be manage.

Is it there is limitation in fortinet that is per interface only one access point (cisco) can be connect.

Thanks and best regards.