[Haskell-cafe] How to use "bracket" properly ?

[zaxis]

winSSQ count noRed noBlue = do {
    yesRed <-  [1..33] \\ noRed;
    yesBlue <- [1..16] \\ noBlue;
    bracket (openFile "ssqNum.txt" WriteMode) (hClose) (\hd1 -> pickSSQ
count yesRed yesBlue hd1);
    return ()
}
will report:
Couldn't match expected type `IO ()' against inferred type `[()]'
    In a stmt of a 'do' expression:
        bracket
          (openFile "ssqNum.txt" WriteMode)
          (hClose)
          (\ hd1 -> pickSSQ count yesRed yesBlue hd1)

However, the following works fine:

winSSQ count noRed noBlue = do
    let yesRed =  [1..33] \\ noRed
    let yesBlue = [1..16] \\ noBlue
    bracket (openFile "ssqNum.txt" WriteMode) (hClose) (\hd1 -> pickSSQ
count yesRed yesBlue hd1)

Why ?
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