Okay - first off - SLOW DOWN !!!
You will get everything to work just fine if you take your time !
Here is how you insert the new diode :
unscrew the aixiz casing - take the BACK half, and turn it around...see that tiny hole ? GOOD - now, insert the PINS of the diode into that hole.
Now, take the FRONT half of hte casing, and place it on top of the diode the way it is supposed to be. Now how do you suppose the diode is going to SLIDE on in there ? Well - take this whole "assembly", holding it together with finger and thumb - and place it in a vice. Yup, a VICE ! Now, tighten the vice SLOWLY (notice the whole SLOW theme here ?) and watch as the diode slides right on into the front half of the casing ! There ! You have it now ! Now - BEFORE YOU DO THIS - make sure there is no crap on your diode's lense...please ? I cannot believe you got it so close to the match that it got scorched ! Slow down, man ! Yer gonna kill it !