Moss advanced Search with "CreatedBy" and "ModifiedBy" Properties no result Found

Hello

I want to share a littile experience with MOSS advanced Searrch

When we query the search agent throw advanced Search page "Pages/Advanced.aspx"

with filter properties of "CreatedBy" or "ModifiedBy" ,the result stack on Zero.
After same reading and diggings

I found this procedure that solve me this isseu

So in brief - We need to modify the CreatedBy properties and add the mapping of office:4(text) and place it on the top mapping .

We need to modify the ModifiedBy properties and add the mapping of office:8(text) and place it on the top mapping

Next Complete a full crawl and BINGO !!

Tanks Yaniv Shasha