consciousness, body in relation to umwelt, functionalism, computers and may Merleau Ponty

If our consciousness always includes consciousness of our body in relation to our environment, then how can it be a that a computer program, which, according to functionalism, can run in precisely the same way in different computers, is ever conscious?  The differences in these machines are like the differences in bodies that are situated differently with respect to the same concrete object. The fact that they are not differently aware while their programs run in different machines with different characteristics and in different situations can be explained by the fact that they are not aware of their bodies at all, and that is not far from saying that they are not aware at all: they are just tools we use to understand the world.