problem installing on precise 12.04

I followed the wiki to the T. and this is what I get when I sudo apt-get update:
Err linuxcnc.org percise/base i386 Packages
404 Not Found

W: Failed to fetch linuxcnc.org/dists/percise/base/binary-i386/Packages 404 Not Found

I think this is why sudo apt-get install linux-image-3.4.55-rtai-2 rtai-modules-3.4.55-rtai-2 doesnt work.

Can anyone tell e whats going on?

I followed the wiki to the T. and this is what I get when I sudo apt-get update:
Err linuxcnc.org percise/base i386 Packages

It is precise not percise

If English is not your first language, it would be advisable to cut and paste whenever possible

regards