sh: askbot-setup: command not found

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I was fallowing the instructions given in the documentation but

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*                                                            *
*  Thanks for installing Askbot.                             *
*                                                            *
*  To start deploying type: askbot-setup                     *
*                                                            *
*  Please take a look at the manual http://askbot.org/doc/   *
*  And please do not hesitate to ask your questions at       *
*

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but after this i am unable to execute askbot-setup command

here is the error:

sh: askbot-setup: command not found