what's the exact filename of your texture? probably it is something like 'tilesfloor.tga" or .bmp or whatever. You must include the extension, but replace the period with an underscore.. like so: tilesfloor_tga
It's my bump mapping demo, the error means it can't the texture attached to this bmp load function (tilesfloor) in your game folder. Could you post the loading part of your script and the texture names you're using so I can fix it for you