button at the bottom of the screen in MediaTransfer and then click the 
button.
In this step we will run iTunes and turn sharing if your Music library on.. We do this for your iPhone or iPad to automatically find your PC.
Run iTunes.
Clicking the Edit menu... select Preferences
Select the the Sharing tab.
Check the box that says "Share my library on my local network."
Click OK.
You can turn this off right after MediaTransfer has found your computer.