"Offline Page" error when using cname

I have been trying to run 2 websites on the same external IP. I am currently running 2 apache2 instances one on port 80 and the other on port 8080. Everything is working perfectly on port 80 however to get acess to port 8080 while also hiding the IP has proved difficult. I have setteld for the flowing set-up.

1. A free hostname “officialtjp.redirectme.net” with a port 80 redirect to port 8080 on my external IP. This successfully redirects people to the website however the url bar has the IP and the port info.

2. Using a sub domain of my main domain I have set up a CNAME record from “web.officialtjp.com” to point to “officialtjp.redirectme.net” in order to hide the IP and port info in the url bar.

The problem occurs when I try to access my wordpress site via “web.officialtjp.com” I get an error message titled “Offiline Page”. The message says, “The site you have requested is currently unavailable, please try back again later.”. What can I do to make this work or is there an easier way to hide ip and port? Thanks in advance for any and all help.

Jamie