Blank Page Error Messages

Hi,
i'm installing zc and new to zc.
i got this message on my website (it happens when i click on the link in category's box).

[22-Sep-2008 13:22:26] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/umiabe/public_html/zc/includes/languages/indonesian/credit_cards.php:2) in /home/umiabe/public_html/zc/includes/init_includes/init_templates.php on line 78
[22-Sep-2008 13:22:26] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/umiabe/public_html/zc/includes/languages/indonesian/credit_cards.php:2) in /home/umiabe/public_html/zc/includes/functions/functions_general.php on line 44

can anyone explain to me how to settle this?

tqvm.

Searching for "headers already sent" in the FAQ area brings up this article: https://www.zen-cart.com/tutorials/index.php?article=87

tq.
solved.