For those who wanna activate sis 2011b here a easy way take these 2 files http://data.oto-hui.com/ypjduupon9cm.html and http://data.oto-hui.com/jv8zjghde1rc.html un zip both rars and copy to folder C:\Program Files (x86)\Caterpillar\SIS\bin say yes to replacing then open sis it will give...