My diode isn't broken, I have tested several times just by holding the wires together by hand to fire it up and it works. After a night of sleep, I tried to solder again and succeeded with all 4 wires with pre-tinning the wires which I did by putting wire+tin the same time to the soldering iron and I fired the laser and it worked!!! So then I screwed the body part on and it didn't work.. Hmm.. why? Well, when I opened it all the 4 joints had broken!!!!!!!!!!!!!!!!!!!!!!
I'm sending it to Jeff tomorrow.
Thanks for all the tips people!! Oh and, I bought a soldering iron with 15 different tips and some markers or stuff (why would you need that?) and two of the tips are pointy, and both of them are really dirty now and have thick layers of stuff on them, and when I use a moist sponge to clean it off, the whole soldering iron gets miscolored and a black layer is put on top of the iron...