I am attempting to install a newer version of HPLIP on a CentOS 5 server to all support for a newer printer.However I have been unable to do this so far. I found there was an updated package on  repoforge found here http://pkgs.repoforge.org/hplip/. So I installed repoforge and attempted to install. When I tried using yum to install it simply states the latest version of hplip was already installed. Any ideas why I cannot install the repoforge version of hplip? Or does anyone know of a good way to install the newer hplip?. I have also tried to auto install .run file from the official site this locks up my ssh session and the .rpm file has dependency issues. 
CentOS 5 hplip newer version
centos;hplip