[TYPO3] reset BE user password

[LinTong]

Hallo everybody
 
I tried to use the extension "cwt_resetbepassword" to implement the function that BE user can initialize his password.But the extension "cwt_resetbepassword" does not work.When I input the correct User name it told me that the user does not exist.Does anybody know what the matter is? or can anybody tell me an extension which implement a similar function? 
My typo3 version is 4.2.
the link of cwt_resetbepassword
http://typo3.org/extensions/repository/view/cwt_resetbepassword/1.2.0/
 
thanks very much
 
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