CRE Loaded Community

I am getting a blank page upon successful check until you refresh the page then it displays correctly. I checked the error log and got the following error.

[Tue Dec 20 13:28:22 2011] [IP:64.68.5.134] [URI:/shop/checkout_success.php?action=success&order_id=8&osCsid=fda0101214d80c9ad3ab1d6defdabcbe] Severity: 2 --> Cannot modify header information - headers already sent by (output started at /home/ibdwl/public_html/geolutionlab.com/shop/checkout_success.php:115) /home/ibdwl/public_html/geolutionlab.com/shop/includes/functions/general.php 165

so then I checked both the files in the error log and made sure there was no blank spaces before or after the (<?php or ?>) tags

Try this:
http://creloaded.org/extensions/Fixes/o ... tails.html

Simon