I have a customized show/hide login layer under login menu(header), i just copy codes from tpl_login_default.php as below:

<?php echo zen_draw_form('login', zen_href_link(FILENAME_LOGIN, 'action=process', 'SSL')); ?>
<label class="inputLabel" for="login-email-address"><?php echo ENTRY_EMAIL_ADDRESS; ?></label>
<?php echo zen_draw_input_field('email_address', '', 'size="18" id="login-email-address"'); ?>
<br class="clearBoth" />

<label class="inputLabel" for="login-password"><?php echo ENTRY_PASSWORD; ?></label>
<?php echo zen_draw_password_field('password', '', 'size="18" id="login-password"'); ?>
<?php echo zen_draw_hidden_field('securityToken', $_SESSION['securityToken']); ?>
<br class="clearBoth" />

<div class="buttonRow forward"><?php echo zen_image_submit(BUTTON_IMAGE_LOGIN, BUTTON_LOGIN_ALT); ?></div>
<div class="buttonRow back important"><?php echo '<a href="' . zen_href_link(FILENAME_PASSWORD_FORGOTTEN, '', 'SSL') . '">' . TEXT_PASSWORD_FORGOTTEN . '</a>'; ?></div>
</form>

just log in has an error:

There was a security error when trying to login.

what shall i do?

zen-cart 1.38a