My update.. i worked over the textures an light... here some table cloth examples i rendered:

http://www.yiung-li.de.am/1standard.jpg
http://www.yiung-li.de.am/1cloth2.jpg
http://www.yiung-li.de.am/1cloth3.jpg
http://www.yiung-li.de.am/1cloth4.jpg

PS: Shadow looks weird!?