I just went and ripped apart a 2400ff I haven't wired yet. the 5 and 6 pins are the correct pins to wire to if I'm remembering right. The flash will not work unless there is film in the camera, so as long as you are hearing the camera when you short the two wires you probably have it wired right.
I've wired eight of these cameras. I don't have a digital cam to take a pic. If you look under the shutter button there are 3 gold circles, look at the middle one and follow it's path to where it splits into 2 silver contacts. That's where i have soldered mine and have had no problems. Is that where you soldered the two wires?