Error on default sample project after fresh installation

Just installed latest LoadUI 2.1.1 on Windows 7 x64 (with normal internet connection).
After launching LoadUI and creating the sample "WebPage Load test", Running it always shows Failed.
In the System log I see a Java error:


I've already tried Uninstalling twice (including deleting the /Users/.loadui folder) but I get the same results.

We don't use any proxies, the URL opens fine in the browser... Any ideas?

Thanks in advance