Vismat - can not scale the texture?

[mhmtlgrr]

Hello,

I found a free vismat, and tried to test it. I used a 200cm X 100cm X 25cm cube (like a real-world sized wall), and applied this material, which can be found here: http://luzindirecta.luxisessentia.co...=674&Itemid=64

But I can not change the texture size. It does not show Texture-Position options when I right click the object.

What can I do?

Thanks