Error (Data mining): Either the user, xxxx-PC\xxxx, does not have permission to access the referenced mining model or structure

i'm trying to do some DMX query on MM using SQL server 2012 management studio my query is

SELECT Flattened  PREDICT([Orders Details],2)
    FROM [MM] 
    NATURAL PREDICTION JOIN
      (SELECT (select 'Milk' as [item] 
      union
      select 'Bread' as [item] ) 
       AS [Orders Details] ) As T 

but i get this error Error (Data mining): Either the user, xxxx-PC\xxxx, does not have permission to access the referenced mining model or structure, MM, or the object does not exist.