Virtual Server not working on FortiWifi 51E 5.4

Hi,

We are actually testing Fortinet to replace our router and I can't make the Virtual Server working.

I have two interfaces : a WAN interface (wan1) and a Lan interface (internal).

If I create a Virtual IP (not Virtual Server) from WAN to LAN, it works fine, I can access my internal server from outside.

But when I want to use a Virtual Server (configured through the web interface), nothing happens : I have no error message, I can't access my server from outside, and there is nothing in Monitor / Load Balance Monitor.

I used, as specified, a different IP on the wan interface than the one configured as primary wan ip. This IP is correctly routed because it works fine with a Virtual IP.

Here is my configuration : 

config firewall vip
edit "vs-http"
 set uuid 52b2575e-00c1-51e6-44ca-70e4e2d77d83
 set type server-load-balance
 set extip 37.xxx.xxx.222
 set extintf "wan1"
 set server-type http
 set monitor "vs-ping"
 set ldb-method round-robin
 set extport 8082
 config realservers
 edit 1
 set ip 192.168.200.3
 set port 80
 next
 end
 next
end

And here is the associated policy : 

config firewall policy
edit 4

set name "vs-http"

 set uuid 810e4f8e-00be-51e6-1949-2249a6106602
 set srcintf "wan1"
 set dstintf "internal"
 set srcaddr "all"
 set dstaddr "vs-http"
 set action accept
 set schedule "always"
 set service "HTTP"
 set logtraffic all
 set nat enable
 set fixedport enable
 next

end

Also, I can't select HTTPS for Server Type as it doesn't appear in the list. I don't know if both problems are linked or not.

Do you have any idea on how to solve this problem ?

Thank you for your help,

Fred