I have done as per this video says http://www.youtube.com/watch?v=fVsNdJ2OwPg

Difference is:

I don't have primay-master and primary-slave, I have only one drive which has memory of 126.9Mb and free memory of 73.9mb.

apart from this difference every thing I did is same as the video shows.

After I did that said in video, I can't able to connect to internet. Once I remove NAt rule from firewall then I can able to connect to internet. Thank for watch the video. Let me know if you guys find difficult to watch video, I'll try to post screen shot or write on my own about what I did.

Doesn't any one understand my question, please leave me comment If you guys don't understand my question, I'll try to make it better.