Offset textures

I want to change the Offset of my texture. I'm using the free version of Unity. I can change the number below " Offset" but there's no effect on the model/texture. What am i doing wrong?

What are you modifying it by? If your texture scale is 1, changing it by whole numbers will not make any apparent change (an offset of 2 is basically placing the texture a tile along, which in a tiling texture will look identical). Try values in between integers.