Navigation on CR not working for 3+ pages on IIS

I have a C# project that uses Crystal reports. When running locally, I can navigate normally for reports with more than 2 pages. When running from the web server, it navigates to page 2, but after that, clicking next reloads page 2.

I tried the solutions posted online, moving the code from page_init to page_load, this fixed it on local platform, but not on IIS web server. So I am guessing there is something missing with the Crystal Reports set up on the server.

Saving the report as PDF shows all 3 pages, navigation doesnt show errors or anything, just reloads page 2 again

This is my page_init

protectedvoidPage_Init(object sender,EventArgs e)
   {
   if(IsPostBack)
   {
   // RefreshRaportData();
   if(Session[REPORT_SESSION]!=null)
   {
   int exportFormatFlags =(int)(CrystalDecisions.Shared.ViewerExportFormats.PdfFormat|
   CrystalDecisions.Shared.ViewerExportFormats.WordFormat|
   CrystalDecisions.Shared.ViewerExportFormats.ExcelFormat|
   CrystalDecisions.Shared.ViewerExportFormats.RtfFormat);

   CrystalReportViewer1.AllowedExportFormats= exportFormatFlags;
   CrystalReportViewer1.ReportSource=(ReportDocument)Session[REPORT_SESSION];
   CrystalReportViewer1.RefreshReport();
   }
   return;
   }

   // set these params only after Server.Transfer
   var entry =(ItnMena)PreviousPage;
   if(entry !=null)
   {
   #region set values from previous page
   PNROfficeId.Value= entry.PNROfficeIdText;
   SignIn.Value= entry.SignInText;
   RecLoc.Value= entry.RecLocText;
   LastSaveTime.Value= entry.LastSaveTime.ToString("yyyyMMdd HHmm");
   FirstPerson.Value= entry.PaxLastNameText;
   UserOfficeId.Value= entry.UserOfficeId;

   //if (ViewState[FLIGHT_BAGGAGE_ASSOICATION] != null)
   //{
   // FlightBaggageAssociation[] flightBaggageArray = (FlightBaggageAssociation[])ViewState[FLIGHT_BAGGAGE_ASSOICATION];
   // flightBaggageList = new List<FlightBaggageAssociation>(flightBaggageArray);
   //}
   #endregion

   #region reset session values
   ClearSession();
   #endregion
   }