New switch does not pass traffic

Fortiwifi 90D.

This is driving me nuts, we want to replace a switch plugged into LAN1, fortinet is configured for a soft switch. When we plug the new switch into port 1 it does not pass any traffic, What am I missing. I see no VLANS configured and I see nothing in the old switch, its a very old 10/100 netgear that I can not see any programming inside of it. what could possibly be stopping traffic?

We need to plug the new switch into the old switch to get any traffic passed.

here is configurtion of the lan softswitch interface

rtr1 # show system interface lan

config system interface

 edit "lan"

 set vdom "root"

 set ip 192.168.168.1 255.255.255.0

 set allowaccess ping https ssh http fgfm capwap

 set type switch

 set alias "SterNet"

 set device-identification enable

 set role lan

 set snmp-index 7

 next

end