the train connot go from hyderabad 2 secunderabad in this route.........that is the reason why even other trains like hussain sagar express do not stop at secunderabad . hussain sagar exp also takes the same route till kalyan and it is a prestigious train because it connects financial capital to major state capital and it is daily also and it is a superfast..hence it is given more preference to this train thus it starts from hyderabad.
by the way begampet station is just 5 or 6 km from hyderabad..hence there should not b any problem.