Configure sflow on s60 switch!!

We've configured sflow on s60 switch but somehow its dropping all of the traffic Here is the guide we used to configure it :

http://blog.sflow.com/2009/07/configuring-force10-switches.html

Here is the screenshot of sflow configuration on sw :

http://prntscr.com/azq3z8

- The agent ip is the one configured on management port.
- The collector server is configured on nfsen/nfdump using 6343 udp port.

If anyone can point us to right direction that'd be very helpful. Here is the URL to access nfsen :

5.254.101.205/.../nfsen.php

Thanks!!