It was released in the first version of the cassette.
Also one more song "aadipattam..." was there.
Lateser these two were replaced by "Kathakelu.." and "sivarathiri"
This song even situation/lyrics match to Sivaraarthi, How will Aadippattam match to KathakeLu?!? I guess they recorded that song when one of the role was different. may be one out of Kameshwaran or Raju were assumed to be villagers..
Here is the song in youtube.
http://www.youtube.com/watch?v=3zwf6XbIMwI
yes the song was eventually replaced by Sivarathri.