Hi and welcome to FixYa. I am Kelly. The instruction manual is here:

http://shopfnc.com/pdffiles/williams2man.pdf

Steps to light the pilot are on page 10. This unit as a pizo-electric igniter that is suposed to light the pilot. When you open up the cover to light the pilotfollowing the manual steps on page 10 check the contacts on the igniter. Sometimes they get stuck together. You can lightly sand them with 120 grit or higher sand paper if the contacts stick.

Thanks for choosing FixYa,

Kelly