Paypal & 2Co Payment Errors


I have been trying to configure payments for both paypal and 2checkout on my site through demo payments and i have the below errors:


Once i have been directed to paypal sandbox (also tried in live mode) the below error appear:

				Error Detected

Your shopping cart is empty.


The payment process works perfectly while when finalizing the process to go back to my site through the approval URL that i have copied from cs cart to 2CO configuration

The below error appears

503: Service temporarily unavailable

And this happens every time i have tried for 3 days.

You may try to buy something and try yourself (all payments are set on demo status)

Thank you