Exactly which connector did you buy? The Rocket and Tactical models have an overtravel stop that you have to file down. Until you file it down to the correct point, you can't pull the trigger far enough to release the firing pin.
Ghost Inc connector installation instructions:
(note that you may have to adjust the bend angle, how much the connector is bent outward from the trigger housing. see: "SECTION II: INSTALLATION ROCKET & TACTICAL", just below that you'll see "Note:
", with instructions on how to adjust the bend angle)
To get the gun apart, you have to lock the slide back, detail strip the slide and remove the firing pin assembly. With the firing pin removed you can push the slide forward off the frame. Here are some detail strip resources if you need them.
Correct slide stop spring position: http://glocktalk.com/forums/showpost...29&postcount=3
On the following page are some Glock Armorer's Manuals, just scroll down to the "G" section. I learned from the Update Manual and 2009 Manual. The 2009 Manual has a few pages missing, but that info can be found in the Update Manual as well.
Here's an easy way to disassemble and reassemble the firing pin assembly: