OTRS 4 installation dependencies

hi all ,

i was following this http://www.unixmen.com/setup-help-desk-system-using-otrs-centos-6-5/ guide to install OTRS 4 (eventhough guide is originally for OTRS 3.3) on CentOS 6.5 .but after completing installation i couldn't proceed with installing extra perl modules since some of them were not found. following are those dependancies .please share your openions