Tablet problem

This evening I received the last details and everything what was missing for my cintiq, but again... I've set the avg output, Installed the tablet driver from cd that I had and don't know why, computer only reacts to the pen touch and lcd screen says "no sync". I've connected everything correctly, checked few times, restarted computer few times too. I have no clue what could pssibly go wrong, maybe someone could help me?