Paypal integration: Please return to the payment page and correct the address

I'm trying to do a payment on my web with a VISA card and when i press Pay i get this error: Please return to the payment page and correct the address.

Debug of input hidden values:

c开发者_Go百科md->_hosted-payment
subtotal->0.6
business->--deleted--
currency_code->GBP
template->templateD
billing_first_name->Fulanito
billing_last_name->Benganito
billing_address1->Pepito Nº 14
billing_city->Temple (Vinewood)
billing_zip->29013
billing_country->Spain
lc->US

Any idea? Thanks, regards.

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I figured it out, I should post country as 'ES' instead of 'Spain'.