Installation error

Hello I am having problem in Phalcon installation. I am using ubuntu and while updating after the addition of ppa i m getting error this W: Failed to fetch http://ppa.launchpad.net/phalcon/stable/ubuntu/dists/quantal/main/source/Sources 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/phalcon/stable/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found help me to resolve out it Thanks!

I could not get that working either and I ended up installing from git sources:

You can follow this blog post:

https://www.digitalocean.com/community/tutorials/how-to-install-and-get-started-with-phalcon-on-an-ubuntu-12-04-vps