Did a cname to my domain.co.uk to domain.com.. global.asax redirect not working

Ok i have a

domain.com and domain.co.uk. Domain.com is my real domain with physical content.

I made a cname so domain.co.uk visitors see all data from domain.com

Now i am doing some redirects in my search in global.asax and seems everything is working on my co.uk domain except for the search.

here is the relative code from the global.asax file

// If the dummy page is hit, then it means we want to add another item
    // in cache
    string url = HttpContext.Current.Request.Url.ToString().ToLower();
    if (url.Contains("/property/s/") && url.Contains("localhost"))
    {
       FakeUrlCheck(4);
    }
    else (url.Contains("domain.com/property/s/") && url.Contains("domain.com/property/s/"))
    {
        FakeUrlCheck(4);        
    }
  else if (url.Contains("www.domain.co.uk/property/s/"))
    {
        FakeUrlCheck(4);        
    }


}
void FakeUrlCheck(int length)
{

    string AbsUrl = HttpContext.Current.Request.Url.AbsolutePath;
    string[] urlInfo404 = AbsUrl.Split('/');
    if (AbsUrl.ToLower().Contains("/property/s/") && !File.Exists(Request.PhysicalPath) && !AbsUrl.ToLower().Contains("property/default.aspx") && urlInfo404.Length == length)
    {
        string location = urlInfo404[length -1];
        StringBuilder sbParams = new StringBuilder();
        sbParams.Append("?AL=");
        //if (location.Contains(", "))
        //    location = location.Replace(", ", "--");
        //if (location.Contains(" - "))
        //    location = location.Replace(" - ", "--");
        //if (location.Contains(" "))
        //    location = location.Replace(" ", "--");

        if (location.Contains("--"))
            location = location.Replace("--", ", ");
        if (location.Contains("-"))
            location = location.Replace("-", " ");
        //if (location.Contains(" - "))
        //    location = location.Replace("~", "-");