WiFi issues with Macbook Pro OS x Lion 10.6.7

I have a Macbook Pro running OS lion 10.6.7. I have only just purchased it and I purchased a Bigpond Ultimate Mobile Broadband Wi-Fi Next G(Black, recently released)brand name Sierra. I have selected airport on the Mac and it connects fine and says I'm online. The Wi-Fi instructions said to open a web page to register. I did this but it won't proceed past the start button. An information box states that 10.5.8 or later is required for installation. Mine is 10.6.7. can someone tell me what to do. The Ultimate is a stand alone wireless device not a USB device and it doesn't even show up on telstras list of wi-fi devices online. Thank you.