Add to cart not connecting to paypal a/c

[esam 1965]

Hi,
I'm new to web builder.
From my existing site I have 5 books for sale. Two of the five "add to cart" options don't connect to Paypal. I've compared html code. I've compared property settings but I'm stuck. The tutorials don't give much information specific to this problem. Help would be much appreciated.

Thanks

[Pablo]

What exactly did you do?
What is the URL of the page?
Where exactly on the page do I need to look to see the problem?

Note that the built-in PayPal tools are standard PayPal functionality, so if it does not work then there is most likely a mistake in the settings.