Bidmap texture of material not showing in render (toucan)

I have created a new material and uploaded a bid map for it yet in the render/rendered view the bidmap does not show on the object it is assigned to (screen shot attached - the walnut texture should be on the black box). In fact the object renders as the color defined even though the diffuse color box is checked.
Any ideas what the problem could be? I would very much appreciate any kind of advice on how I can make the wood texture to be shown on the object. I am new to Toucan since I used Vray before.
Thank you!

Please post your model and your texture file.