Session/Cookies Not Persisting on Web Server

I have an intranet ASP.NET application that I am trying to deploy to a web server. Running the application on my development IIS server works fine, but on the web server, while the application runs, it does not save any cookie or session information. So, I created a test program to see if there was something wrong with my larger application, and the same behavior occurs, i.e., the devlopment server runs fine but web server still cannot save cookies (I didn't bother with session variables yet).

The code for the two pages in the test app is as follows:
Set Cookies (default.aspx):

protected void Page_Load(object sender, EventArgs e)
        {
            HttpCookie myCookie = new HttpCookie("UserSettings");
            myCookie["Font"] = "Arial";
            myCookie["Color"] = "Blue";
            Response.Cookies.Add(myCookie);
        }


Read Cookie:

if (Request.Cookies["UserSettings"] != null)
            {
                if (Request.Cookies["UserSettings"]["Font"] != null)
                {
                    Label1.Text += Request.Cookies["UserSettings"]["Font"];
                }
            }

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wframsayAsked:
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wframsayConnect With a Mentor Author Commented:
I was able to fix this by removing the underscore from the server name. Apparntly, IE8 doesn't like underscores in server names, so it assumes that you have switched Trust Zones each time you load a new page.
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Saqib KhanSenior DeveloperCommented:
you writing and reading cookies on same domain

for example: yahoo.com is NOT same as www.yahoo.com

what version of IIS and Windows server are you using?
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wframsayAuthor Commented:
The test application is only running in a single domain (on our internal network). The example shown above is running in two separate ASPX pages on the same server.

We are using IIS 7, Windows Server 2008 R2 Standard, 64-bit.

The following Role Services are installed on the server:
Web Server
   Common HTTP Features
   Static Content
   Default Document
   Directory Browsing
   HTTP Errors
Application Development
   ASP.NET
   .NET Extensibility
   ISAPI Extensions
   ISAPI Filters
Security
   Windows Authentication
   Request Filtering
Management Tools
   IIS Management Console
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wframsayAuthor Commented:
As an additional piece of evidence - the test app works with FireFox, but not with IE8 or IE7.
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wframsayAuthor Commented:
Is this thing on?
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wframsayAuthor Commented:
I accepted my own solution as nobody answered after the first question on this item.
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