Website Issue

I have created a website in IIS and hosted it on my WHS 2011 server.

Here is my issue that I need help with:

I have secured a domain name from Go Daddy and have forwarded it to my WHS 2011 server "servername.homrserver.com"

When I type in my domain from Go Daddy, it brings up my website but it shows the URL as servername.homeserver.com not the URL domain name I bought from Go daddy.

Is there any way to have the URL I bought from Go Daddy show up in the URL ?

Thanks,