Paypal SetExpressCheckout function problems

Ok....I have modified the SetExpressCheckout function that is called when you checkout with Paypal.
The problem is my updated code doesn't appear to be called at all and I can't step into it ?

Any ideas ?

Maybe someone can tell me how to pass the shipping address to Paypal.  The way it is setup now with 1.9 I need to pass the shipping address to Paypal.  That's what I really need.

which PayPay module?  Standard or Direct?

I am using the PaypalExpress and PayPal Direct.

According to the site, I should enable both.  I assume Paypal Direct let's me take the credit card portion of the payment.
And if they want Paypal, the paypal express is enabled for that.

When they click on Paypal Express and redirected to Paypal I need to be able to change that address.

and what version of nopCommerce?

Thanks for your patience, I should have been more specific.

1.9

Ok, it has been a while when I modified those sources but im sure it gets called.

SetExpressCheckout definitely gets called but it's weird because I can't step into it even though I see the source code.

Unless SetExpressCheckout is tied to Paypal Direct somehow that I am not aware of.

My goal is to simply change the shipping address that Paypal receives with the order when using Paypal Express.
Whatever works the best for that, I am all ears.

I figured out I had to copy the dlls to the bin directory and the dependency/compiled directory.

So I can step into the code now.   I changed the address but when I make the request I get a paypal error 10731.
It says the country is missing but I know it's all filled in ?  Any thoughts ?  Could this be a version issue ?
Not sure what version NOP uses