[Milad]

Please try to replace the content of the hook: "Show Profile Fields In Postbit" at postbit_display_complete to the following:

PHP Code:

$in_template_hook = $this->registry->options['profile_fields_place'];
eval('$template_hook["$in_template_hook"] .= "' . fetch_template('postbit_profilefields') . '";'); 


and let me know if this solves your proplem.

Edit: don't forget to hit save button again!