AMC 4 at 101.0°W - LyngSat Maps
Did your receiver come with any directions at all?
It sounds like you are trying to recycle the dish and lnb from a purpose built combination. This complicates the efforts, particularly for someone new to the subject, as you must understand how what you have work and how to make it do what you want versus a (slightly) more documented product intended for a variety of end-user configurations.
You need a linear LNB, which you appear to have (two in one infact). You'll need to aim your dish so that the LNB you are connected to is picking up the signal from AMC4.