It's possible that you encounter an internal error. To fix it, try to perform a fresh install of the product. In order to do that, you first need to completly remove it from your system. This can be done from Start > Control Panel > Programs and features > uSkyPhone > Uninstall. To be noticed that you should keep applications on your system up-to-date at all time. To download the latest version of this one, visit the developer's official website. The latest version listed there is 220.127.116.11.