My drivers side window hates me

[WRMZ71]

I swear my drivers side door hates me!!! It's always something going wrong with that door. a while back I put a new window regulator in it and had it working fine but a couple weeks ago one day it will only go down a foot or so no more. But then it would roll up fine. well i took it apart today and the rail thats attached to the bottom of the window is no longer attached to the bottom of the window Does anybody know if i can just glue that back in there somehow or how exactly did that rail connect to the window? Any help would be appreciated. thanks guys and gals