Carl,
You are probably in a country that I have blocked at my store server. I block all countries except US, UK, AU, and CA. I do this for 2 reasons.
1) I was overrun by spammers and hackers from other countries. This required a lot of time and effort to keep my sites clean. Thats time I do not have. I even block my own state of Pennsylvania so I do not have the added work of handling sales tax.
2) I only ship direct to the aforementioned countries. Other countries would have to go through a reshipper.
You can probably circumvent my server blocks by using a VPN.