applying texture to a material on a mesh with ID's

Dear Unreal Helpers.

I have been trying for hours to apply a texture to a material in ue4.

I have created the model which is a 3d plan of a house in 3ds max with different rooms. I have unwrapped to on channel 2 for light maps.

I have applied a multi sub object and assigned Material ID channels 1 to 15.

I have imported the fbx file into UE4 and everything comes in ok I open an element in the materials and i can change the colour, but i cannot for the life of me get a texture to show up on the element/ material id in the viewport

can anybody help.

Many Thanks in advance

Kind Regards

TJ