Give a little background as to what server, are you using RVM, Passenger, etc. If this is a Passenger error, then the problem lies with confusion between Ruby versions (especially, if not exclusively, with RVM). Follow the instructions here. I was having that problem on an Ubuntu server with RVM until I ran passenger-install-apache2-module, which fixed everything.
I just noticed that it didn't accept the link, so here it is: https://rvm.io//integration/passenger/
Last edited by jleecbd (2012-07-14 23:21:40)