Ajudication of game result?

I just finished a game in which I had a winning king and pawn ending but the game stopped with the message "Game Drawn due to lack of Winning Material". When the game ended my pawn (white) was on b3, my king on b4, his king on b6 and it was his move. Looks like a win, is there something I'm missing? When the game ended I still have 1:42 on my clock and it was my opponent's move.

[Sean]

I just finished a game in which I had a winning king and pawn ending but the game stopped with the message "Game Drawn due to lack of Winning Material". When the game ended my pawn (white) was on b3, my king on b4, his king on b6 and it was his move. Looks like a win, is there something I'm missing? When the game ended I still have 1:42 on my clock and it was my opponent's move.

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