Kan inte ändra texten i koden?

Jag försöker ändra lite i en Wordpress plugin. Men om jag ändrar något i texten så skickas e-post meddelandet inte iväg.

Det jag vill ändra är texten som syns i e-post meddelandet t.ex. ämnet som nu är "Subscription/Contact form submitted". Sen även texten där det stå "Phone" ska ju vara telefon osv. Någon som vet vad jag ska göra för att kunna ändra texten?

<?php
/* Admin Notification for Layered Popups */
class ulp_mail_class {
	var $default_popup_options = array(
		"mail_enable" => "off",
		"mail_email" => ""
	);
	function __construct() {
		if (is_admin()) {
			add_action('ulp_popup_options_show', array(&$this, 'popup_options_show'));
			add_action('ulp_subscribe', array(&$this, 'subscribe'), 10, 2);
			add_filter('ulp_popup_options_check', array(&$this, 'popup_options_check'), 10, 1);
			add_filter('ulp_popup_options_populate', array(&$this, 'popup_options_populate'), 10, 1);
			add_filter('ulp_use_mailing', array(&$this, 'use_mailing'), 10, 1);
		}
	}
	function use_mailing($_use) {
		return true || $_use;
	}
	function popup_options_show($_popup_options) {
		$popup_options = array_merge($this->default_popup_options, $_popup_options);
		echo '
				<h3>'.__('Admin Notification Parameters', 'ulp').'</h3>
				<table class="ulp_useroptions">
					<tr>
						<th>'.__('Enable mailing', 'ulp').':</th>
						<td>
							<input type="checkbox" id="ulp_mail_enable" name="ulp_mail_enable" '.($popup_options['mail_enable'] == "on" ? 'checked="checked"' : '').'"> '.__('Send details to admin', 'ulp').'
							<br /><em>'.__('Please tick checkbox if you want to receive submitted contact details by e-mail.', 'ulp').'</em>
						</td>
					</tr>
					<tr>
						<th>'.__('Admin e-mail address', 'ulp').':</th>
						<td>
							<input type="text" id="ulp_mail_email" name="ulp_mail_email" value="'.esc_attr($popup_options['mail_email']).'" class="widefat">
							<br /><em>'.__('Enter your e-mail address. Submitted contact details will be sent to this e-mail address. You can set several comma-separated e-mails.', 'ulp').'</em>
						</td>
					</tr>
				</table>';
	}
	function popup_options_check($_errors) {
		$errors = array();
		$popup_options = array();
		foreach ($this->default_popup_options as $key => $value) {
			if (isset($_POST['ulp_'.$key])) {
				$popup_options[$key] = stripslashes(trim($_POST['ulp_'.$key]));
			}
		}
		if (isset($_POST["ulp_mail_enable"])) $popup_options['mail_enable'] = "on";
		else $popup_options['mail_enable'] = "off";
		if ($popup_options['mail_enable'] == 'on') {
			$emails = explode(',', $popup_options['mail_email']);
			$emails_found = false;
			$emails_invalid = false;
			foreach ($emails as $email) {
				$email = trim($email);
				if (!empty($email)) {
					if (!preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,9})$/i", $email)) $emails_invalid = true;
					else $emails_found = true;
				}
			}
			if (!$emails_found) $errors[] = __('Admin e-mail must be valid e-mail address.', 'ulp');
			else if ($emails_invalid) $errors[] = __('Admin e-mail must be valid e-mail address.', 'ulp');
		}
		return array_merge($_errors, $errors);
	}
	function popup_options_populate($_popup_options) {
		$popup_options = array();
		foreach ($this->default_popup_options as $key => $value) {
			if (isset($_POST['ulp_'.$key])) {
				$popup_options[$key] = stripslashes(trim($_POST['ulp_'.$key]));
			}
		}
		if (isset($_POST["ulp_mail_enable"])) $popup_options['mail_enable'] = "on";
		else $popup_options['mail_enable'] = "off";
		return array_merge($_popup_options, $popup_options);
	}
	function subscribe($_popup_options, $_subscriber) {
		global $ulp;
		$popup_options = array_merge($this->default_popup_options, $_popup_options);
		if ($popup_options['mail_enable'] == 'on') {
			$body = __('Subscription/Contact form submitted.', 'ulp').'<br /><br />
				'.(empty($_subscriber['name']) ? '' : '<strong>'.__('Name', 'ulp').':</strong> '.esc_attr($_subscriber['name']).'<br />').'
				<strong>'.__('E-mail', 'ulp').':</strong> '.esc_attr($_subscriber['email']).'<br />
				'.(empty($_subscriber['phone']) ? '' : '<strong>'.__('Phone #', 'ulp').':</strong> '.esc_attr($_subscriber['phone']).'<br />').'
				<strong>'.__('IP', 'ulp').':</strong> '.$_SERVER['REMOTE_ADDR'].'<br />
				<strong>'.__('Popup', 'ulp').':</strong> '.esc_attr($popup_options['title']).'<br />
				<strong>'.__('URL', 'ulp').':</strong> '.$_SERVER['HTTP_REFERER'].'<br />
				'.(empty($_subscriber['message']) ? '' : '<strong>'.__('Message', 'ulp').':</strong><br />'.str_replace(array("\r", "\n"), array("", "<br />"), esc_attr($_subscriber['message'])).'<br />').'<br />
				'.__('Thanks,', 'ulp').'<br />Layered Popups';
			$mail_headers = "Content-Type: text/html; charset=utf-8\r\n";
			$mail_headers .= "Reply-To: ".(empty($_subscriber['name']) ? esc_attr($_subscriber['email']) : esc_attr($_subscriber['name']))." <".esc_attr($_subscriber['email']).">\r\n";
			if (isset($ulp)) {
				$mail_headers .= "From: ".(empty($ulp->options['from_name']) ? esc_attr($ulp->options['from_email']) : esc_attr($ulp->options['from_name']))." <".esc_attr($ulp->options['from_email']).">\r\n";
			}
			
			$mail_emails = explode(',', $popup_options['mail_email']);
			foreach ($mail_emails as $mail_email) {
				$mail_email = trim($mail_email);
				if (!empty($mail_email)) {
					if (preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,9})$/i", $mail_email)) {
						wp_mail($mail_email, __('Subscription/Contact form submitted', 'ulp'), $body, $mail_headers);					
					}
				}
			}
		}
	}
}
$ulp_mail = new ulp_mail_class();
?>