自定义函数，mi的值没有传过来，不知道为什么？求助

SELECT count(pno)
FROM person
WHERE plevel>3 And xplace<=mypower(2,plevel-3)*1 And xplace>=mypower(2,plevel-3)*1-mypower(2,plevel-3)+1;

mi的值没有传过来，不知道为什么？

Public Function MyPower(di As Integer, mi As Integer) As Integer


    Dim iC As Integer
    Dim i As Integer
    iC = 1
    i = 0
    
    For i = 1 To mi
        iC = iC * di
    Next i
    
    MyPower = iC
    


End Function