please help me!! Xentry

[SingularityXD]

Hi!! i need some help please, im buy a new MB Multiplexer with Xentry and install it in my laptop, i want it to check the Mercedes Benz OM Series Industrial Engine of my Claas Jaguar 870(Silage harvester) im a Agricultural technician but i never use this system, the harvester have to test a ADM 14 PIN in frontal panel, I have a bridge USB to COM in my laptop to plug in in this the multilpexer connector. The multiplexer shows a green ligth, but when i want to start test by the ADM its say an error, its like if he not found the engine or something, i don't know if i have to switch on electrical systems of the harvester, i test it with the switch off (battery connected but not ready to start engine XD), but i dont, know , smebody can help me ?
show me a guide or tell me step by step! plz
i need help to make this work
Thanks for your time, and sorry my english is bad.!

http://www.claas.com/countries/generator/common/bilder/claas-com/product-world/products/fh/jaguar_alt/83928x564y250,property=data,lang=en_UK.jpg

http://lh4.ggpht.com/_5AumI1tW5Ys/SsW5hQhlRbI/AAAAAAAACdc/IqGld57N--c/Mais+2008+(185).JPG

[afterhours]

you have to turn key on and make sure you have it con figuared right and it should work