Paypal IPN and Checkout White Screen of Death

ZC Version: 1.3.8
Browser: Mozilla Firefox 3.5.7
Upgrades: Added Darkness Template second day after install
Site URL: http://shop.mak-corp.net
When Started: Noticed after completing Paypal IPN Standard
First Store: No
Tested Before Going Live?: Yes, I tested before going live and it worked fine for me, after going live I noticed I was not receiving any sales and this has been a week now, no one seemed to email support until today and told me that they're getting a blank white screen when trying to complete the order.

Description:

Hello there. I thought I'd combine two major issues I'm having in one post as to not make multiple posts.

Firstly, I have set up the paypal IPN - Website Payments Standard and after setting it all up with the right info (checked 100 times), it has a green active icon but keeps saying processing, is that right?

Secondly, every time someone adds something to their cart or tries to go to complete checkout which takes them to the paypal page, they get a blank white screen and nothing loads. I've tested this too and its the same thing. It also happens on account creation, login in and login out.

Any help would be appreciated as this shop is very vital to my business.

Thank you for your time and hope to hear from someone soon.

Shanakar:

Firstly, I have set up the paypal IPN - Website Payments Standard and after setting it all up with the right info (checked 100 times), it has a green active icon but keeps saying processing, is that right?The "order status" column where you see "processing" is simply telling you the status that new orders will be set to when paid-for using that module.
"Processing" is the typical default status for new orders paid by PayPal.
For more information on what different order status values indicate, see Chapter 19, page 298 of the Zen Cart manual: eStart Your Web Store with Zen Cart: https://www.zen-cart.com/book

Shanakar:

Secondly, every time someone adds something to their cart or tries to go to complete checkout which takes them to the paypal page, they get a blank white screen and nothing loads. I've tested this too and its the same thing. It also happens on account creation, login in and login out.
You need the debug-logging tool to identify where the problem is occurring in the customizations you've made to your site:
https://www.zen-cart.com/tutorials/index.php?article=82
You'll likely find that it points to a problem that this FAQ article addresses: https://www.zen-cart.com/tutorials/index.php?article=87

Hello DrByte.

I'd like to thank you very much for taking the time to reply to me, everything now works fine after using the debug-logging tool and the FAQ. Thank you very much for your time, I really appreciate it.