Your clock ran out? That's the usual explanation.

if you opponent can't mate you when you run out of time its called a draw by insufficient material.

But even if i ran out of time, my opponent should win on time!
if anyone run out of time, he/she shall lose on time, isn't it??

there is no possible way your oppoenet can win the game. This is also a draw by insufficient material

http://www.fide.com/component/handbook/?id=124&view=article

"6.9 Except where one of the Articles: 5.1.a, 5.1.b, 5.2.a, 5.2.b, 5.2.c applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by the player. However, the game is drawn, if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves."

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LOL this position is very funny
well, thanks to u all..i got it

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Thanks for this..