Only the right brake light works!

Hi bumnround I just removed the BRAKE / Turn Signal assembly by the one phillips head screw that holds it to the steering collar I never split the assembly. Where I put washer was under the phillips head in order to press the two plastic pieces together better to make a good contact. I picked up a used one but when you have the left turn signal on & press the break the right break does not work. The old one for now seems to be working fine as long as you center the turn signal lever. I found a new one I don't know if they have them in stock, but when I'm feeling rich I'm going to give them a call.
http://www.megapartsusa.com/proddetail.asp?prod=114-190085

Cheers! Jeff