To troubleshoot the Reflection for the Web Launcher, open the Reflection for the Web Launcher Settings application to configure Java Console output, logging, caching, etc.
From the Start menu, select Reflection for the Web Launcher Settings.
The Iced Tea Web Control Panel opens.
Once launched, look at the Debugging section for options to troubleshoot Web Start and Reflection for the Web.
This screenshot shows the Debugging Settings after they have been enabled.