Hi All:
I know that not long ago someone posted the same problem that I am facing, 
however , I do remember the answer.

(A)I successfully installed the DYNATEXT browser.
(B) I have successfully installed the the books. When call dytext
(C) I do not see the Netview 5.1 books, instead I see my old V3 books.
(D) I checked the installation using smitty and I saw that the old books were 
installed.
(E) I ran the /MUSTSEE rm nvbook script.
(F) I removed the old books via smitty.
(G) I re-executed step   (B) and I get the same results as in step (C.)  
 (H)