Some hosts or browsers will block IPs and your access to our website or order pages. This may often happen at your workplace where they don't want you to be checking out lottery products in work time. (All the better to win enough to quickly exit that job!)
You may have an IP block. Unfortunately I can't help you with that - check with your internet provider to release it... they are usually very helpful.
The easy whitehat solution is to access the URL from this anonymous browser: http://anonymouse.org. I have to use it for the Massachusetts Lottery and USA Powerball because these organisations sometimes block access outside the USA. There's always a legal way around it!