st: error with mlogtest

["stata_user stata_user" <stata_dofile@hotmail.co.uk>]

Dear all,
I am using stata 9 and working with mlogit , I want to apply the 
likelihood-ratio tests for independent variables
I have both binary independent variables and continuous independent 
variables, and my outcome has 3 categories

I have the follwoing error message when I use the mlogtest

Any help please, thanks

Sami


*-----------------------------Error------------------------------------
mlogtest, all
mlogtest2 already defined
(error occurred while loading mlogtest.ado)

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