I'm using twilio as for a mobile verification mechanism, I have no prior experience in using twilio but looking at the sample PHP code I used this one in my code but apparently it's giving me an 400 Bad request HTTP error. Here's the code:

    d = {
        'TO' : '*** *** ****',
        'FROM' : '415-555-1212',
        'BODY' : 'Hello user, please verify your device using                    this code %s' % verNumber
    }
    try:
        print account.request('/%s/Accounts/%s/SMS/Messages' % \
                            (API_VERSION, ACCOUNT_SID), 'POST', d)
    except Exception, e:
        return HttpResponse('Error %s' % e)

verNumber is randomly generated and the receiver's number is validated in twilio.

Thanks.