Wix Installer Adding UI

[elioYakidoo]

Hello I am using the latest WixInstaller 4.0 for developing a service installer, and I am getting an error whenever I add a UIRef to the the XML.
IE:

<UIRef Id="WixUI_Mondo" /> <UIRef Id="WixUI_ErrorProgressText" />

The error I always get is the "Error LGHT0001: '.' hexadecimal value 0x00, es not a valid character"

Whenever I compile my code without this the msi file is generated with no issue, I have the references to the extension on my Visual Studio Project.

I am using VS2010
.Net Version 4.0
The error is whenever I build my WIX Project.
using Windows 8

[DevMichaelSabo]

Have also this error code with newest build 4
light.exe(0,0): error LGHT0001: '.', hexidezimaler Wert 0x00, ist ein ungültiges Zeichen.

[robmen]

Duplicate of #4485