ECM: not located!!!

[4x4billy]

where did it go!?!?!? lol

Greetings everyone... just got my gryphon in the mail, went to hook it up and where it should give me a Hex code it tells me that the ECM could not be located... i checked the connection with the OBD port and unhooked everything waited my 5 seconds, tried again and still the same thing. I'm sure i'm doing something wrong but I just cannot figure it out. I've read the book several times and while my comprehension level isn't the best, i feel like it's fairly simple.

hook gryphon to cable
turn key on
plug in to obdII port

acknowledge the caution/warning (no more of those)
and it does not find the ECM, or give me a hex code... what am i missing??