I recently purchased and installed a Callaway shaft adapter. On swing 3 at the range, the adapter came apart.  The part I glued to the shaft was there, the part that screwed into the head was there, but it had come apart where the two pieces were together.  This was the first time I have installed a shaft adapter. Was I supposed to glue these two parts together before assembly or was this a flawed adapter?  Just need to know for future work.