importing c4d model with textures(images) failed

When I import a 3d model with textures in c4d format(with images in the 'tex' folder), I can only get the model without any textures. I tried many models, and also tried to convert the c4d file to fbx or obj(with mtl file and images specified in the mtl file) formats, the images cannot attach to the model. My c4d version is r14 Could anybody give some help please? Thank you!