json not working on server in IE

I have an ajax call that returns json from my server. On my local machine the code works in all browsers and does exactly what it should be doing. When I load it on my server. Windows 2008 R2, it works in both Chrome and Firefox, but not in IE. I can't figure out what is wrong or what the solution maybe. Any ideas?? Again it works locally just fine in IE when in debug.

 $("#<%=txtPositionTo.ClientID%>").blur(function () {
                 currentObject = $("#<%=txtPositionTo.ClientID %>").val();
                 $.ajax({
                     type: "POST",
                     url: "Data.asmx/GetToPosition",
                     data: "{PostionNumber:'" + currentObject + "'}",
                     contentType: "application/json; charset=utf-8",
                     dataType: "json",
                     success: function (data) {
                         var a = data.d;
                         a = $.parseJSON(a);
                         BindPostionTo(a);


                     },
                     error: function (xhr, ajaxOptions, thrownError) {
                         alert(xhr.status);
                         alert(thrownError);
                     }

                 });

             });

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