हाटे-बाजारे एक्सप्रेस : चलती - फिरती मछली बाजार - Piyush Singh

I would like to book tickets from Secunderabad to Ahmedabad in AC 2Tier or AC 3Tier all the trains are in W/L, I would like to know the Summer Special Trains running between these two Stations. I tried booking in TATKAL but could not go through the error "Service Not Available" on the IRCTC, by the time the error goes off all the tickets are booked and W/L 25 is displayed.
I would like to know how to book the tickets ??

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