Quote:

I then loaded a different audio program on my PC



No reason to do this. Just select the correct audio driver in PT Options Preferences Audio Drivers button.
If it was the 'Mic In' connection, set PT to that. It's not a good choice, but if it works for now ...

Look on the input side and select the soundcard with the 'mic in' as the port being used, make sure it's the only one highlited, then click 'Move selected device to top' button.

Now it is the default recording device.
Leaving things set up exactly as described by you in your post above, as far as MIDI cables and Audio cables, go to a new blank track in PT, right-click and set Type to audio-stereo.

Now hit record, and you should get a new track of audio from your synth.
Now yer rollin'.
You can also mute/unmute MIDI tracks and record each different patch from the synth to its own audio track for even more control.
I think you are really close to being really happy.

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