I have suffered similar experiences using Parley.
Sometimes I can login, and sometimes the login process freezes at the user/password screen.
So, I give up and try again later.
My Android phone has not trouble logging in — don’t do anything but start the App, and I’m in !! (NO security there!).
I have complained several times via the support@parley.com email address at the bottom of their homepage, but NEVER have received a response.
Their window of opportunity to become the conservative alternative to Facebook will only last so long.
I’m already looking for a better alternative.
What do you recommend?