Phpmailer Not Sending All Fields

I am having difficulty sending data from completed form by email.

I have modified a Html_quickform from PHP Anthology which works fine on the server.

I also included & Instantiated phpmailer to send the recipient.all the info set out in the form when submitted.

The email also works fine,I receive the email ok.

However none of the completed fields show up in the body of the email message except for one field only,that is 'body' but not the completed field or 'when' or any multiple fields submitted.

I'e tried deleteing $form->getSubmitValue('body') from the Form
and sending $form->getSubmitValue('when');only

The 'when' field shows up in the email message.
It's either one or the other but not both together.

Do I need to set up an Array to collect all fields in a single $data variable?

// Add the body of the message
$mail->Body = $form->getSubmitValue('body');
$mail->Body = $form->getSubmitValue('when');