Part blank page on Checkout Confirmation

[kvwlls]

I've recently been trying to upgrade my shop to a new template, from the perfectly functional cherry_zen to the modern zen_jellyfish.

On testing with purchases, i can go through the checkout process all the way to checkout_payment, but when i click through to checkout_confirmation, i get blank where the order detail to review should appear. As i say, it works perfectly in cherry_zen.

I ran the debugging tool, along with the extra 'configure.php' in 'local' - and the following error was logged:

[13-Oct-2009 15:46:21] PHP Warning: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cookie - headers already sent by (output started at /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/extra_configures/enable_error_logging.php:56) in /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/functions/sessions.php on line 108
[13-Oct-2009 15:46:21] PHP Warning: session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/extra_configures/enable_error_logging.php:56) in /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/functions/sessions.php on line 108
[13-Oct-2009 15:46:21] PHP Warning: Cannot modify header information - headers already sent by (output started at /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/extra_configures/enable_error_logging.php:56) in /www/sites/lcn/www.sunplastics.co.uk/web/shop/includes/init_includes/init_templates.php on line 78

I've also now re-installed the above mentioned files, still to no avail!

I've had to revert back to cherry_zen for time being, but will move to jellyfish if requested (if someone can help?!)

www.sunplastics.co.uk/shop

Thanks,
Kevin

NB - i now know my product images are way too big - working on that next!