Hi,
I am trying to do the same but it could be an issue with the Paypal address. I have a SMC account which is for me by far the most cost effective way to purchase cards via the U.S. But with Myslabs they only use your Paypal address and from what i can see so far i cannot add an international address. The SMC address for eBay is stored via eBay so i don't have this issue when purchasing cards through eBay.
Anyone else that can offer any support/solutions to this?
Cheers
John