durlag's tower

i finally beat baldurs gate tho it seemed to me the guys in the cave outside the catacombs were more difficult than sarevok. now i've paid my 60 gps to go on the tour of durlags tower and i'm waiting, and waiting, and waiting...the guy is a no show. click on the door of the only tower i can see and it says that the interior's crumbled to dust. what gives? am i at the right tower and when does the guy show up? j

Officer Vai: You'll have to talk to Ike in Ulgoth's Beard before you finish Durlag's Tower. Once you arrive at Durlag's he'll be waiting for you outside the main entrance.

There's a couple of other towers around the place. May be a stupid question, but after you paid your 60 gp (was it to Ike in the town of Ulgoths Beard?) did the new area appear on your map? Then have you gone to the tower map and passed the vendor and the guards to get to the gate? Ike should be waiting there for you, on the wooden drawbridge.