Help with running BleachBit in Centos 6.6 server

Hello,

I sucessfully installed python in my KVM CentOS 6.6 server and downloaded and installed BleachBit1.6-1.1. Below you can see the steps I performed. However, when I try to run BleachBit it will not do it and display the error message "RuntimeError: could not open display". Any advice on how to solve this is welcome!

Thanks

itmonitor

1. Install Python: sudo yum install pygtk2 python-simplejson
2. Install BleachBit:
wget katana.oooninja.com/bleachbit/sf/bleachbit-1.6-1.1.centosCentOS-6.noarch.rpm
and
sudo yum install bleachbit-1.6-1.1.centosCentOS-6.noarch.rpm

root@server [~]# bleachbit
Traceback (most recent call last):
File "/usr/bin/bleachbit", line 37, in
import gtk
File "/usr/lib64/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 64, in
_init()
File "/usr/lib64/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 52, in _init
_gtk.init_check()
RuntimeError: could not open display
root@server [~]#