[cheburashka]

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Why are you trying to bluff a calling station... ?

[/ QUOTE ]

Thanks all, for your helpful responses.

I actually wasn't trying to bluff; rather, he had shown such a willingness to play literally anything pre-flop (including calling 4X raises) that I viewed my bets more or less as value bets. In the event, I checked behind on the river, and he showed down A7. I was just wondering if I had lost value by failing to fire a third time, but I guess I'll be more careful next time.