Request help on authorize.net

[senthhu]

I am trying authorize.net in test mode.

 

if((MODULE_PAYMENT_AUTHORIZENET_TESTMODE == 'Test') || (MODULE_PAYMENT_AUTHORIZENET_TESTMODE == 'Test And Debug') ) {

exec("$curl_path -d $data https://test.authorize.net/gateway/transact.dll", $response);

}

 

 

here, I am getting the error as , "There was an error processing your credit card - ():" I am using the test credit card numbers are,

 

Visa :4007000000027

Master card:5424000000000015

 

 

Please help me to sove this error.