Intermittent performance using rest end point in Javascript CRM 2011

Hi there,

I have used rest end point to createa  record from ribbon button click on a system form. It is working fine...but some times it doesn't work and again later it starts working. So there is a chance of creating unnecessary records but mistake.

sample code

function createRecord(concatenatedorders) {
    var ODATA_ENDPOINT = "/XRMServices/2011/OrganizationData.svc";
    var CRMObject = new Object();
    /////////////////////////////////////////////////////////////
    // Specify the ODATA entity collection
    var ODATA_EntityCollection = "/skyscale_invoiceprocessingSet";
    //   alert("Entered the Odata entity point");
    /////////////////////////////////////////////////////////////
    // Define attribute values for the CRM object you want created

    CRMObject.skyscale_invoicegroup = concatenatedorders;
    CRMObject.skyscale_invoicebatch = { Id: invoiceBatchId, LogicalName: 'skyscale_invoicebatch' };
    CRMObject.skyscale_requesttype = { Value: requesttype };
 
     //    CRMObject.Telephone1 = "123";
    //  CRMObject.Fax = "456";
    //Parse the entity object into JSON

    var jsonEntity = window.JSON.stringify(CRMObject);
    // var jsonEntity = CRMObject;
    //Asynchronous AJAX function to Create a CRM record using OData
    $.ajax({ type: "POST",
        contentType: "application/json; charset=utf-8",
         datatype: "json",
        url: serverUrl + ODATA_ENDPOINT + ODATA_EntityCollection,
        data: jsonEntity,
        beforeSend: function (XMLHttpRequest) {
            //Specifying this header ensures that the results will be returned as JSON.
            XMLHttpRequest.setRequestHeader("Accept", "application/json");
        },
 
        success: function (data, textStatus, XmlHttpRequest) {
            alert("success");
            var NewCRMRecordCreated = data["d"];
            //      alert("CRM GUID created: " + NewCRMRecordCreated.skyscale_invoiceprocesssingId);
         },
 
        error: function (XMLHttpRequest, textStatus, errorThrown) {
            alert("failure");
        }
 
    });
 
}

Here I am bit confussed am I missing something or using rest end point is not that good advice

FYI

Environment : CRM 2011 on premise multitenant

onload of the form: Jquery, json libraries

when the functionality doesnt work, I do IIS reset, aynchronous reset but still doesn't work

Kind Regards,

SAMA