You can try also this:
Our game activation key interface form is based on the Internet Explorer engine. If such problems with the activation appear – they may be connected with the problems with the Internet Explorer or antivirus/firewall software. If you’ve already disabled your antivirus/firewall software, lets continue our tries with the Internet Explorer itself.
So, please carefully follow these steps:
1. Disable/Remove all excess plugins, which usually accumulated by the Internet Explorer during the web surfing. Some of these plugins and Active X components may prevent some Internet Explorer functions from correct working. And if such happens it may also make our activation window malfunction. Here’s a detailed illustrated instruction how to disable/remove Plugins and ActiveX components in the Internet Explorer –
www.dummies.com/how-to/content/how-to-remove-unwanted-addons-from-internet-explor.html Try to disable all of them.
2. Reset all your Internet Explorer configuration settings to the default values. This may be done with accordance of this instruction –
support.microsoft.com/kb/923737/en
3. Try updating your Internet Explorer to the latest version from the Microsoft web site –
windows.microsoft.com/en-us/internet-explorer/download-ie
4. Install all available updates for your PC (Windows operation system) and other Microsoft products. You can do it using the “Microsoft Update” (or “Windows Update”) shortcut in your Windows “Control panel”. Details about updating your Windows operation system are on the Microsoft web site –
windows.microsoft.com/en-us/windows/help/windows-update