Hi,
Firstly what is the model/product of your machine ? There are many m6 around. You need the right dvivers for your machine which have been tested from HP otherwise they may not work. Again, we need to know your machine and its OS. Please use the following method to find out:
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00033108
Regards.