Mother's Visitor visa rejected..Need help

[koipallil]

My mother had her interview in Chennai consulate on 30-Nov. She is employed in Kuwait and she was on her leave in India and i thought to do her stamping from India. I think this was a mistake. The VO asked her usual questions like reason for visit, whereabouts about kids and all. In our application we have put the intended date of travel as March 2011. The VO asked her, "You are employed in Kuwait, and then how can you go to US from India". I really did not understand the point of this question and my mother replied She has her leave sanctioned to go . He did not ask her for nay documents and since he did not ask her any docs she did not show the leave approval letter that she got from her employer. After this question the VO told her Sorry Mam, can’t give you the visa now. I really don’t know what went wrong.
Was it a mistake to do her interview in India? Should i have tried in Kuwait? is there anything like that once its rejected you will never get a visitor visa? Do we have to show the supporting docs even if the VO did not ask for any docs? Please advice. Any advice or experience will be really appreciated.

Thanks,
PV

[kabkaba]

She should certainly try from Kuwait.