In the default setup you may not hear the guitar being input via PT.
Have you tried to record it (even though you don't hear it) to see if it results in a waveform being created on the track?
Try to record it for a few bars and see if anything visually shows up.

Let's start there, then work at hearing it via PT while recording.


Make your sound your own!
.. I do not work here, but the benefits are still awesome