Can not open a pdf ebook with drm on my acrobat reader

I have downloaded an ebook in pdf format, and it is protected by drm, and I can't find any way to open this dokument in my acrobat reader. I have made an account in acrobat, but cannot find a way to open this book. Would be thankful for some help... (or a phonenumber I can call for help? do you have an office in Norway?)