White page after upgrading

OK, this "white" page hang up is happening to us now after our upgrade. Also in admin the last 10 day history shows each day the same as today. BUT big problem if customers cant checkout!

What is your error log saying

you can find this in your /cache directory just select the most recent error debug files and read them

there is also an FAQ on blank pages, have a look for it as it may help you

zencart/cache folder...i do not see an error log there but the last debug log says the following;

[25-Aug-2010 16:02:26] PHP Fatal error: Cannot redeclare class fedexexpress in /home1/cindysci/public_html/zencart/includes/modules/shipping/fedexexpress.php on line 25

i deleted the fedexexpress.php and the fedexground.php in the above listed folder and now the process works. there at one time was an error on shopping cart that those files were missing, so I put them there. MY FAULT! but fedex is no longer listed in my shipping modules