I wasn't able to get any Silverlight apps to run on Frank's World, so I asked WebHost4Life's helpdesk and found out the MIME type for XAML is not set by default.
Here is the response I received from their help desk.
On server side, Please add the new MIME type for SilverLight
.xaml - application/xaml+xml
The site MIME setting can be managed for each domain in the control panel.
If specific MIME type is not set, the browser will not play/display the file type inside it, and a download box will pop up and ask the visitor to save the file.
Location to set MIME type:
Control Panel >> Site Admin >> IIS Manager (Right hand side) >> Set MIME Type
Now, my LED control demo works. :)