Silversword

I am having trouble with three quests:

1. Find Location of Portal

2. Find Onyx Scepter

3. Talk to Athron

Find Location of Portal.

I found the location in the Empire Archives. Returned to Tower of Magi. Mahdavi refuses to recognize it and tells me I need to find the location of the Portal. How do I get her to recognize it?

Find Onyx Scepter

I found the Scepter (It is listed in my special items list). Return to Mahdavi and ask her what to do next. She says I have to find the Onyx Scepter. How do I get her to recognize it?

Talk to Athron

Talked to Erika. She sends me to Athron. I arrive and stand on pentagram. Voice says he doesn't want to see me and to get out. I have gone out and returned and now get no response at all. Returned to Erika but no help there. How do I get to see Athron?

I can't progress the game until I can get the above tasks accomplished. Would appreciate any help.

Thank you. Thank you. Thank you.

I don't know why I oouldn't find the exit.

I have the Eye of Cathdoc. I leave the second tunnel. I tried to leave by going back to the outside entry valley, but it refuses to allow me to leave that way.

How do I get out of here?