Sites which acquire smart card readers won't open

Hello,

it took me a while to find the right driver for my ACR38U card reader, but now I've found and downloaded it, it seems none of the sites that work with it (like tax-on-web) will open.
It always says "impossible to open page". I'm new on Windows 7, so I quess it's some to do with "security" in "internet options", but I can't find it.
Can someone please help me out?
Thanks!
Danny

Have you tried to contact the support for the website?