Issue 2 AP are disconnected

I replaced a switch old hp that was broken with netgear FS728TP.

Switch is up and running but it see that 2 AP are not connected on the Fortigate 100E.

Ports are up on the switch and i see the mac addresses of the AP's on that switch.

They do not seem to connect. When i plugin my laptop on the 2 ports i automaticly get a ip in the correct range.

I checked the fortinet webportal (Managed AP's) and there i see that they are disconnected (status) but connected via the management interface (port10).

any ideas how to resolve this issue?