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Execute AsyncTask several times

In my Activity I use a class which extends from AsyncTask and a parameter which is an instance of that AsyncTask. When I call mInstanceOfAT.execute("") everything is fine. But the app crash when I press an update button which calls again the AsyncTask(In case the network job didnt work). Cause the...
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Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds

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Syntax highlighting for Jade in Sublime Text 2?

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HTTP status code 0 - Error Domain=NSURLErrorDomain?

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How do I get elapsed time in milliseconds in Ruby?

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Copying the GNU screen scrollback buffer to a file (extended hardcopy)

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How to copy a file from one directory to another using PHP?

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Eclipse's Ctrl+click in Visual Studio?

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Where does the iPhone Simulator store its data?

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What's the difference between JavaScript and JScript?

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