Auth.net Issue on capture

My function to capture the transaction on auth.net is

public function capture(Varien_Object $payment, $amount){

    if(!$this->isEnabled()){
        return parent::capture($payment, $amount);
    }else{

        $captureCase = $_POST['invoice']['capture_case'];
        if(isset($captureCase) && $captureCase == "online"){
            if($capOrderid = $payment->getOrder()->getIncrementId()){

                $capOrder = $payment->getOrder();
                $capPayment = $payment;
                $capAmount = $amount;

                $capTransID = $capPayment->getLastTransId();

                $ccProfile = $this->getProfileForOrder($capOrderid);
                if(isset($ccProfile['used_this_profile']) && $ccProfile['used_this_profile'] == 1){


                    $pID = $ccProfile['cust_profile_id'];
                    $ppID = $ccProfile['cust_paymentprofile_id'];
                    $nick = $ccProfile['nickname'];

                    $lastOrderId = $capOrder->getIncrementId();


                    $cvv = $payment->getCcCid();
                    $directResponseFields = $this->createTransaction($pID,$ppID,$capAmount,$lastOrderId,"profileTransPriorAuthCapture",$cvv,$capTransID);
                    $responseCode = $directResponseFields[0]; // 1 = Approved 2 = Declined 3 = Error
                    $responseReasonCode = $directResponseFields[2]; // See http://www.authorize.net/support/AIM_guide.pdf
                    $responseReasonText = $directResponseFields[3];
                    $approvalCode = $directResponseFields[4]; // Authorization code
                    $transId = $directResponseFields[6];

                    switch ($responseCode) {
                        case "1":
                            $capPayment->setStatus(self::STATUS_APPROVED);
                            $capPayment->setCcTransId($transId);
                            $capPayment->setLastTransId($transId);