How to configure NAT with Virtual IP

[Netscape]

Hi, I got a Fortigate 80C Firewall and have some problems to configure the Firewall Policies. For example I got one Webserver with a static IP in the DMZ. So I configured a Virtual IP with the settings for NAT. But how can I Enable NAT for this server? I´ve read the manual but don´t understand where are these settings.

 Destination Adress:
 If you select a virtual IP, the FortiGate unit applies NAT or PAT. The applied
 translation varies by the settings specified in the virtual IP, and whether you
 select NAT (below).
 

For me to understand, I have to Select the Virtual IP in the Firewall Policy Destination Address Field. But I cannot select the Virtual IP in this field.

[#2]

what external interface u selected when creating VIP? i assume u are creating WAN --> DMZ firewall policy. be sure the external interface u selected in VIP to be used in policy. regards, zeeshan

[Netscape]

Ok, it work´s. Thanks