I tried to buy, following the "Get It Now" button in the email from Stardock about my Fences 5 trial expiring. I enter the data for my credit card and hit the button to buy, and get "We regret that your order could not be accepted. We value your business and would like to help you complete this order. Please contact us for assistance." I double-checked the data, and it's correct. What's the problem?