PHP Custom Form Render warning

I'm receiveing the warning

Strict warning: Only variables should be passed by reference in eval() (line 2 of D:\wwwroot\tixers\modules\php\php.module(80) : eval()'d code).

Everywhere I've looked tells me its a render error but I can't find anything wrong. The form works and submits all my info to the database, but there warning still shows up.

If you need the code for the module let me know and I will reply to it.

THANKS!

I use

<?php
print drupal_render(drupal_get_form('sellTickets_form'));
?>

then in the form 'sellTickets_form

function sellTickets_form($form, &$form_state) {

$form['team'] = array(
    '#type' => 'textfield',
    '#title' => t('Team Name:'),
    '#size' => 30,
    '#required' => TRUE,
);

......break for forms.....

$form['total_points'] = array(
    '#type' => 'textfield',
    '#title' => t('Total Points Awareded'),
    '#size' => 30,
    '#required' => TRUE,
);
$form['submit'] = array(
    '#type' => 'submit', 
    '#value' => t('Submit'),
);
return $form;

}

function sellTickets_form_validate($form, &$form_state){ 
}

function sellTickets_form_submit($form, &$form_state) {
    global $user;
    $uid = $user->uid;
    $team = $form_state['values']['team'];
    $price = $form_state['values']['price'];
    $section = $form_state['values']['section'];
    $row = $form_state['values']['row'];
    $seat = $form_state['values']['seat'];
    $quantity = $form_state['values']['quantity'];
    $opponent = $form_state['values']['opponent'];
    $date = $form_state['values']['date'];
    $location = $form_state['values']['location'];
    $description = $form_state['values']['description'];
    $total_points = $form_state['values']['total_points'];
    $organization = $form_state['values']['organization'];

    db_query("INSERT INTO ticket (
    `TEID`, `price`, `location`, `date`, `organization`, `section`, `row`, `seat`, `quantity`, `opponent`, `description`, `points`) 

    VALUES ('".$team."', '".$price."', '".$location."', '".$date."', '".$organization."','".$section."', '".$row."', '".$seat."', '".$quantity."', '".$opponent."', '".$description."', '".$total_points."');"
);
}