Making post request after authentication expired

Question

I'm writing a web application using C#, ASP.NET, jQuery and using forms authentication:

<authentication mode="Forms">
  <forms loginUrl="Account/Login.aspx" defaultUrl="Default.aspx" name=".ASPXFORMSAUTH" timeout="30" />
</authentication>
<authorization>
  <deny users="?" />
</authorization>

The application is a command & control that designed to be open for a long time, using SignalR for receiving data from the server and jQuery ajax for sending data.
I want the user to enter his credentials if he refreshed the page (F5), so the authentication ticket timeout is set to a minimum of 1 minute only, in the login.aspx.cs:

FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(userFullName, false, 1);
string hashedTicket = FormsAuthentication.Encrypt(ticket);
HttpCookie httpCookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashedTicket);
Response.Cookies.Add(httpCookie);
string returnUrl = Request.QueryString["ReturnUrl"];
if (returnUrl == null)
    returnUrl = "~/Default.aspx";
Response.Redirect(returnUrl);

The problem is that after 1 minute, every jQuery post request is rejected, with the error message:

Failed to load resource: the server responded with a status of 401 (Unauthorized)

Should I incorporate any authentication data in the post request?
Any other solutions?

Answer 1

I've solved it by adding another aspx page, which holds all the web methods.
All of the jQuery post requests were diverted to this new page.
I've added the following to the web.config file:

<location path="DataResponsePage.aspx">
  <system.web>
    <authorization>
      <allow users="*"/>
    </authorization>
  </system.web>
</location>