What window manager are you talking about? And when you say install & configure, are you talking about compiling from source or installing via Pacman?
I only ask because I have never had a problem with a window manager on Arch.
That's bad luck - but was there a reason you needed to build your own wm? If you were able to get X and a *dm running, you could just install one of the many prepackaged ones (I go with Xfce, myself), and then edit ~/.xinitrc .
I had installed X, tested. Afterwards, wanted to use xmonad, installed it using pacman however couldn't configure. I think I will give another try some time later, since everything I have done so far is still in my laptop.