DMZ - IP Address conflict!

[#1]

I can' t figure this out. I have Fortigate-60 (firmware 413 - build8424) and have DMZ interface configured with the address 192.168.10.1/255.255.255.0. I have a PC directly connected to the DMZ port with a static address 192.168.10.10/255.255.255.0. For some reason, the PC will not connect to the network. Windows complains that there is an IP address conflict with another system on the network. Checking the logs on the PC and it shows the conflict is with the DMZ interface. ( I can tell by the MAC address.) Am I missing something here????? Any suggestions at all are appreciated.

[rwpatterson]

Have you tried another Cat-5 cable there??

[#3]

Okay - tried with a different Cat5 cable. Sadly, same result.

[UkWizard]

Could you post the output of the command; show system interface obviously change the external ip though, so its not disclosed..

[#5]

FGT-60 # show system interface config system interface edit " internal" set vdom " root" set ip 192.168.2.90 255.255.255.0 set allowaccess ping https ssh set type physical next edit " dmz" set vdom " root" set ip 192.168.100.1 255.255.255.0 set allowaccess ping https ssh http set type physical next edit " wan1" set vdom " root" set ip 2xx.2xx.1xx.245 255.255.255.248 set allowaccess ping https set type physical next edit " wan2" set vdom " root" set allowaccess ping set status down set type physical next end

[#6]

That made a difference! I upgraded the firmware to V3 build 0413 - and now the PC connected to the DMZ port no longer complains about duplicate IP addresses. And the DMZ port responds to pings from the PC! So, hopefully I am just down to a configuration issue. Thanks for your help on this, gentlemen.