[Koha] koha 3.6.x is not installing on debian

[Zahid Iqbal]

I am using debian 6.0.5
i want to install koha 3.6.x in it
after adding the line deb http://apt.cpbibliography.com/koha 3.6.x
in the file /etc/apt/sources.list.d/koha.list
and add key wget -O- http://apt.cpbibliography.com/koha/gpg.asc  | apt-key add -
it works fine and key is added
but when i run the command 
apt-get it gives error
E: Malformed line 1 in source list /etc/apt/sources.list.d/koha.list (dist parse)
E: The list of sources could not be read.

any suggestion?