Session timeout on database call in ASP.NET MVC Entity Framework 4.3

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MySQL

MVC3

entity-framework

I am developing classified ads application in ASP.NET MVC3 using Entity Framework 4.3 for database.

I am facing problem when user session is active and execute any database query by entity framework then application session time's out unexpectedly.

Note that the query gets execute successfully and I can see my results as well but after a little while asp.net session terminates.

This only happen when I host my application to the live server (Arvixe). On my Local IIS it is working fine.

If I use any other source for database query then it is working fine.

I have also reset session time-out in web.config. I am using MYSQL. Any thoughts?

I am using this simple login method and it is working fine..

using (Html.BeginForm("ValidateLogin", "User", FormMethod.Post))
 {
 <div>

 <input type="text" name="LoginName" id="LoginName" />
 <input type="password" name="Password" id="Password" />
 
 <p>
  <input type="checkbox" name="RememberMe" /><span>Remember me?</span></p>

  <input id="Submit1" type="submit" value="submit" />

  </div>
 }

[HttpPost]
public ActionResult ValidateLogin(string LoginName, string Password, string RememberMe)
{ 
  User aUser = new User(); //User Class
  var userList= db.Users.Where(u => (u.Loginname.ToLower() == name.ToLower() || u.Email == name) && u.Password == password);

 if (Users.Count() > 0)
 {
  aUser = Users.Take(1).Single();
  Session.Add("user",aUser.UserId);
  return RedirectToAction("Index", "Home");
 }
 else
 {
   return RedirectToAction("Login", "User", new { error = "login" });
 }