Then I'm really out of clues now, sorry - this quest has 3 problematic spots for not solving it:
1.: Refusing the Drudanae plant quest (as Raze said)
2.: Killing Tut too early
3.: Talking to Mardaneus when he's not more in Aleroth.
I'm sorry <img src="/ubbthreads/images/graemlins/shame.gif" alt="" /> - these spots don't seem to apply in your case <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />
Kiya
