page load event not firing in ascx control

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C#3.5

C#5.0

Hi friends,

i have one master page file which calls user control page (AdminleftNav.ascx) filr from code behind.
but the page_load event firing first time in ascx file.
if i refresh the page, it does n't firing.
here is my admin code behind code:

if (HttpRuntime.Cache.Get("LeftNavigation_" + loggedUser.UserId.ToString()) == null)
                   {
                       HttpRuntime.Cache.Insert("LeftNavigation_" + loggedUser.UserId.ToString(), Page.LoadControl("AdminLeftNav.ascx"), null, DateTime.Now.AddMinutes(1000), System.Web.Caching.Cache.NoSlidingExpiration);
                   }
                   var userControl = (UserControl)HttpRuntime.Cache.Get("LeftNavigation_" + loggedUser.UserId.ToString());
                   phLeftNav.Controls.Add(userControl);

my page_load function code is :

protected void Page_Load(object sender, EventArgs e)
        {
            var loggedUser = CommonFunctions.GetLoggedUser();

            if (!IsPostBack)
            {
                try
                {
                    if (loggedUser != null)
                    {
                        companyId = (int)loggedUser.CompanyId;

                        var company = _companyService.Single(x => x.CompanyId == companyId);

                        if (company != null)
                            imgCompanyLogo.ImageUrl = "../images/companylogo/" + company.CompanyLogoPath;

                        var NewVacancies = _jobService.Find(x => x.JobStatusId == 1 || x.JobStatusId == 6).Count();

                        if (NewVacancies > 0)
                        {
                            phJobWaitingForApproval.Visible = true;
                            phNoJobWaitingForApproval.Visible = false;
                        }
                    }

                }
                catch (Exception ex)
                {
                    _log.Log(ex);
                }
            }
        }