berokasem - 2013-01-03

I using kubuntu 12.10 and installed the application by typing "sudo apt-get install clusterssh" in the terminal.
I have created a new file /etc/clusters
Then configured the new location of the file "extra_cluster_file=/etc/clusters"
the /etc/clusters file contains this addresses
cluster user@ user@ user@
and when I type in a terminal "cssh cluster"
I get Unknown configuration parameters: auto_closeibrahim@ibrahim-HP-Pavilion-dv6-Notebook:~
! please help.