who has a map of Iran with Dailam on it?
This might help:
The region of Dailam is perhaps less unknown than its inhabitants; and even before Dailam one has to think of the little canton Dailaman situated in Gilan to the south of the city of Lahidjan, although this district was only a remainder, similar to a colony, of ancient Dailam. As for the Dailamites, their role in the history of Persia began to be drawn with clarity only in quite recent times, due above all to the publication of the work of Ibn Miskawaih, the historian of the Buyid [Buwayhid] dynasty.
I'm confused. Unless my recollection is really off, Dailam and Lahijan are in northwestern Iran near the Caspian Sea, not in the south near the Persian Gulf coast...