Virtual IP limitation?

I need to get our new Fortigate 60B up and running this weekend. I' m not sure if Fortinet' s email support is running, so am posting here, too. I work for a small company, and we are currently using just one public IP address, mapped to multiple internal servers on our 192.168.2.0 network, using a " toy" Watchguard box. It looks something like this <public ip>:21 -> Server 2:21 <public ip>:25 -> Server 1:25 <public ip>:80 -> Server 2:80 <public ip>:81 -> Server 3:81 <public ip>:110 -> Server 1:110 <public ip>:443 -> Server 2:443 <public ip>:444 -> Server 3:444 I can' t seem to recreate this setup with Virtual IP' s. Until I realized that Virtual IP' s were necessary to enable NAT (correct?), it all looked so easy by adding each server under Firewall -> Address. Then I created Firewall Policies for WAN1 -> Internal, mapping each service to the appropriate Destination Address. But it didn' t work. With a Virtual IP it works fine, but it seems I can only map the public IP to ONE internal server. That is, I can send services to just ONE server, not to three. I hope I' m missing something simple, or else this is a HUGE limitation in FortiOS. Thank you!