I have a problem in banner links

I have a problem in banner links. when I click in all banner it show blank page.           I am getting below warning  PHP Warning: Cannot modify header information - headers already sent by (output started at /public_html/shop/includes/languages/arabic.php:1425) in /public_html/shop/includes/init_includes/init_templates.php on line 78   [04-Jul-2011 10:48:48] PHP Warning: Cannot modify header information - headers already sent by (output started at /public_html/shop/includes/languages/arabic.php:1425) in /public_html/shop/includes/functions/functions_general.php on line 44