Hi ya', Goopie......
When the sign comes up that you are looking for you need to click your document/parchment on it and then click it on the old woman. Are you sure you have all four clues:
WARNING SPOILER:
.
.
.
.
.
.
.
.
.
.
.
.
.
.
(from Fugazi's walkthrough:_1st clue; level 1, chamber next to the pit, clue of Ptah.
2nd clue; level 2, first house in the village, clue of Pedjet.
3rd clue; level 3, embalmer's house, sarcophagi room, clue of Heri.
4th clue; level 4, outside the nobleman's tomb, final clue.