When using your own theme there are no edit tabs for Panels pages. You can add those by adding the following snippet to the template.php of your theme:

/**
 * Make edit tabs for Panel Pages available.
 *
 */
function YOURTHEMENAME_preprocess_page(&$vars) {
  $vars['tabs2'] = ctools_menu_secondary_local_tasks();

}

Note that your template.php might already be using a function THEMENAME_preprocess_page. In that case you only need to add the line

$vars['tabs2'] = ctools_menu_secondary_local_tasks();

within the existing function.

This snippet is taken from ctools.module which implements this function for Garland theme.