I have developed an app on parse.com

I have created following function to send SMS using plivo.

```
function sendRSVPSMS(PlivoNumber, GuestNumber, Message) {
    var payLoad = {
        src: PlivoNumber,
        dst: GuestNumber,
        text: Message
    };
    Parse.Cloud.httpRequest({
        url: "<My Plivo URL>",
        method: "POST",
        body: payLoad,
        success: function (httpResponse) {
            console.log('httpRequest success');
            response.success("Sent successfully");
        },
        error: function (httpResponse) {
            console.log('SendSMS: Request failed');
            response.error('Request failed');
        }
    });
}

```

What can be the reason?