Multiple Signers (PHP)

Hello, I am working in integrating your esignlive API in PHP. I have got the form and code working. What I'm trying to do next is to add multiple signers on a form. I've tried adding the code below, but I keep getting returned an 'Unauthorized Access' message. array( 'id' => 'Signer2', 'type' => 'SIGNER', 'signers' => array( array( 'email' => $email, 'firstName' => $firstName, 'lastName' => $lastName, 'id' => 'Signer2', ) ) , ) , On the form I also included the field label: [Signer2.Fullname1] I was told by your sales team that this was possible. Thanks in advance for your help!