If you got it that hot you probably have annealed the metal which makes soldering nearly impossible.
Take it apart and examine the inside of the female section and you will see the brass is discolored. Use a stainless steel ID brush and thoroughly clean it until it is all brite and shiny brass inside, then start over.
brass holds heat very well so you dont need to apply as much heat as with copper. If you get it tooo hot it not only anneals the metal it oxidizes the solder to a crumbly state and it wont hold.
Clean both the copper pipe and the brass fitting really, realy shiny..apply flux and then apply heat from one side, lightly test the heat by touching the tip of the solder to the opposite side from the flame. As soon as the solder begins to flow, remove the heat and feed the solder into the joint. You will see the solder instantly run from the opposite side to the heated side because solder flows toward the heat.
If you want a simple practice exercise to learn how solder flows. take a short piece of copper pipe about a foot long and clamp it in a vise.
Use a piece of emery cloth to clean the top side of the pipe really shiny for the length of the pipe.
Apply flux along the entire length of the shiny part, that heat the pipe near the end and apply solder.
When the solder melts, continue applying to solder on the end and use the heat of the torch to draw the solder along the top of the pipe. You should be able to draw solder 4 or 5" along the pipe with the heat while only appying solder at the end.
We use that as a training exercise in the apprenticship classes.
