connection error unknown host exception

first of all, apologies if this has been covered but i can't get the forum
search function to work.

i'm using azureus 2.5.0.4 on a mac and all eztv torrents always get stuck with
this message and can't connect even after leaving them for days. all other
external torrents are ok, router is set up properly with udp enabled and working.

i'm guessing this is because the trackers are overloaded and this is the same as
connection time-outs as mentioned in the admin's message, but i wanted to check
as i'm not connecting even after leaving it.

advice appreciated

many thanks

i have a connection error myself using azureus, but i am on a pc. werid.

how so?