Yuin Pk2 Retermination Issues

Hello, I own a pair of Pk2's that are broken at the headphone plug end.  I have read about reterminating headphones and decided to give it a shot.  I am using a stereo plug I purchased from Radioshack. 

So far I have been able to strip the wires and connect them to the new plug, however I can only get sound sometimes, and only if I wiggle the wires around and hold them.

There is a blue and red wire, then next to each of these is what I assume is a ground wire.  I have two grounds (one from each side) do these need to be connected together and then sodered to the ground connection?  Or does each ground need to go to the side that it runs through (right/left)? 

I have tried a couple configurations, but nothing seems to give me  a solid connection. 

I have also read that I need to apply a bit of heat to the colored wires to burn off the coating, is this true?

Anyone have expierence reterminating these earbuds?  Am I missing something?  Any advice?  If needed I can post pictures, Thanks in advance!

Thanks for the reply pistol, I've burned off the enamel and have hooked everything up using the screws (i dont want to soder until I know everything is wired correctly), however I still cannot get a solid signal.   I get sound out of the right earbud, and only if i wiggle the wires around do I get sound out of both. 

Can the wires be touching each other in the plug?  Or will that mess up the connection?  Also does anyone know about the 2 ground wires?  Do these need to be together on the ground connector or do they go on each side (Right/Left)? 

I have a feeling i'm close to getting this to work but for some reason the connection is not solid...