2006 Ram Check engine light

I have a friend with a 2006 Ram 1500 5.7 Hemi.

The check engine light is on. I hooked it up to my computer, but cannot get my program to "recognize" that it is hooked up to the truck. I do not have any trouble retrieving codes from other cars with this program. It has worked before on a couple of 2004 Rams that I worked on, but this particular truck is giving me trouble.

Has any one had this happen before? Does anyone know of any recalls or TSB's regarding this? I searched the internet but cannot find any solution.

I'd like to retrieve the code and fix the problem.

Thanks for any help.