I've never used Bitguard. But if it's giving you troubles, try privateinternetaccess.com instead. That's what I use with no problems. They accept BTC.
I tried privateinternetaccess.com a while back. No good for my torrent needs.
They're in the States so anyone can access their logs with a court paper.
My system is highly customized so the Btguard issue may be my own.