[HELP] Reverse Proxy Not Working

[kin0kin]

-Installed Squid 3 package.
-Proxy Server Interface: Lan
-Transparent Proxy: unchecked
-Reverse Proxy Interface: WAN
-External FQDN: firewall.domain.com
-Enable HTTP Reverse Mode: checked
-Reverse HTTP Port: 80

Web Server Tab
-Enable this peer: checked
-Peer IP: 192.168.1.150
-Peer Port: 8080
-Protocol: http

Mappings Tab
-Enable this URI: checked
-URIs:
host.domain.com
host.domain.com/app
http://host.domain.com
http://host.domain.com/app

DNS Forwarder
-Host Overrides:
-Hostname: host
-IP Address: 192.168.1.150
-Domain: domain.com

NAT
-Destination Port: 80:80
-Redirect Target IP: 192.168.1.150
-Redirect Target Port: 8080
-Nat Reflection: NAT+Proxy
-Filter Rule: Use NAT server

Firewall Rules
-Action: Pass
-Interface: WAN
-Destination Port: 80
Cannot access webserver by going to host.domain.com, host.domain.com/app, and also adding http to it.