There is no PC suite for the Karbon Mobile. Visit the link below for getting the drivers For Mobile to use as a Modem.
http://www.karbonnmobiles.com/downloads.php
Now install the drivers and visit my article on how to make connection without using PC suite,
Here is the link for article,
http://prajyotb.blogspot.com/2010/09/mobile-as-modem.html