Ayuda en PhpNuke, Error en los Foros

[ky3zz86]

Buenas, queria saber si alguien me puede decir como podria arreglar estos errores que me aparecen cuando entro en el foro de mi web php-nuke (modules.php?name=Forums)

ERRORES:

Warning: Cannot modify header information - headers already sent by (output started at /home/webcindario/volumen/vol/themes/Purity/header.php:2) in /home/webcindario/volumen/vol/includes/sessions.php on line 222

Warning: Cannot modify header information - headers already sent by (output started at /home/webcindario/volumen/vol/themes/Purity/header.php:2) in /home/webcindario/volumen/vol/includes/sessions.php on line 223

Warning: Cannot modify header information - headers already sent by (output started at /home/webcindario/volumen/vol/themes/Purity/header.php:2) in /home/webcindario/volumen/vol/includes/page_header.php on line 492

Warning: Cannot modify header information - headers already sent by (output started at /home/webcindario/volumen/vol/themes/Purity/header.php:2) in /home/webcindario/volumen/vol/includes/page_header.php on line 494

Warning: Cannot modify header information - headers already sent by (output started at /home/webcindario/volumen/vol/themes/Purity/header.php:2) in /home/webcindario/volumen/vol/includes/page_header.php on line 495



AYUDA!!!