Compatibility in NS 4.5 and others

Good morning,
I have done essay this afternoon, on IE 5 and 6 is working. On NS 7.0 is well. But on NS 4.5 the list in articles_list does not appear.
I wonder If a have something to completed to be sure on navigator. Could you give some advice with others navigators.
Tanks you.

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Alphonse