Hello all, I hope someone is kind enough to help.
I downloaded the newest version of Zen Cart 2 days ago and have set up an online store at http://www.manavaeports.com
I am having a problem when checking out on http://www.manavaeports.com/zc/index...ckout_shipping
Basically it brings up a blank (only this "" in the corner) and will not continue to checkout.
I have searched through all the posts here and on other sites that I can find an nothing is working for me. I have downloaded the Debug Error Logging file and received this error:

[23-Apr-2009 05:04:35] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/content/n/o/g/nogameexports/html/zc/includes/classes/order.php:1) in /home/content/n/o/g/nogameexports/html/zc/includes/functions/functions_general.php on line 44

Another post suggested that it had to do with blank spaces at the end of includes/languages/english/index.php but I have checked both my English and Japanese pages and have found nothing out of the ordinary.

Long story short I am stumped and would greatly appreciate any help.


Thank you in advance