Load Balancer and Port Headers ASP.NET MVC

Question

Hi Guys,

I think I am having Same-Origin problems with javascript being served and I think the problem relates to load balancer. Here are some of the headers I am getting for some javascript

Host , value: www.host.com
Referer , value: http://www.referrersite.com
User-Agent , value: Mozilla/5.0
Http method: GET
tempUri.Host: www.referrersite.com
context referer: value: http://www.referrersite.com
context url: http://www.host.com:20000/some.js
actualHost: http://www.referrersite.com
Application_EndRequest end
Application_EndRequest start

I think that the "context url" is adding the internal Port :20000 for the load balancer - but I am unsure if this is causing the problem ? Is there any way I can "Strip" this Port off this domain ?

I am hoping that this will then solve the problems ?