JQuery function stops working when trying to submit large amount of parameters

Hi,

Run CF9 on Windows 2008 R2 Server.

I have a cfm page with multiple dropdowns (some are cfselect) and dynamically generated lists of checkboxes interdependent on each other. I am using JQuery to submit data to cfc functions and to display data.

It was all working fine until we added new company with large number of records. This translated into large URL query string with a lot of parameters submitted for processing. That's when we started to have problems. I noticed when trying to directly submitting URL, if the total number of characters in URL is more than 2114 I get an error status code 302 Redirect and nothing is displayed. 

I tried to play with postParametersLimit and postSizeLimit increasing to 1000.0 in neo-runtime.xml and restarting server but, this did not help.

Below is jquery function:

function populateBills(){
   var plID;
  
   if ($('#planenrolldate_id').val() == undefined)
    plID = $('input[name=planenrolldate_id]').val();
   else
    plID = $('#planenrolldate_id').val();
     
   var sID = $('#sponsor_id').val();
   var pID = $('#plan_id').val();
  
   var fromMonth = $('#from_month').val();
   var fromYear = $('#from_year').val();
   var toMonth = $('#to_month').val();
   var toYear = $('#to_year').val();

   $.ajax({
    type:"POST",
    url:"../components/billing/custompremstatus.cfc?method=GetBillsArr&planenrolldate_id=" + plID + "&sponsorid=" + sID + "&fM=" + fromMonth + "&fY=" + fromYear + "&tM=" + toMonth + "&tY=" + toYear,
    dataType: "json",         
    success:
     function(data){                 
      $.each(data, function(index, item) {
       addBillsCheckboxes(item.bill_id,item.bill_period);
      });
    }, //end the error function
    error:
     function(){
      alert("An error has occurred while fetching bills");
     } //end the error function
   }); // end ajax call      
  } // end of function