1st u have to make account on irctc or make my trip.com
for irctc
go to irctc.co.in
and give all the necessary info
and whn u make ur account succesfuly,at the home page of ur...
more... irctc page,go to pln my trvl frm ther select source and destination and dte thn select train and thn go to paymnt gateway.....