thank you syanjali. your inputs are much appreciated. Your comments relates to my next question too.
Who was ruling Nepal when Siddhartha Gautama came to the valley?
As far as concerned, the lecture gives some insight on why Buddhism were not able to strive in India though Siddhartha Gautama was a from Hindu society of Kshatriya group. Though Siddhartha Gautama brought his teachings to India, Buddhism really did not make any impact in India even after his death.
Ironically his teachings spread much to the other Asian nations.
So could some help me give some chronological event  of Siddhartha Gautama?

Thanks.