Unfortunately, there could be a number of reasons.
Even though I am guessing that this is not your problem, I'll give you this azureuswiki page Red Smilies since that would be the easiest thing. BTW, you might have to be in Tools/Options/Mode=Advanced (save)to see this and it is under Tools/Options/Connections (expand)/Advanced Network Settings.
What does your NAT circle show?
Router-Do you have one? If so, make and model?
Do you have Vista?
Could also be your ISP. You can check Bad ISPs.
Which port did you set (Tools/Options/Connection) in Azureus?
Might even be the tracker, if they are all from the same. I just had an error on one from Demonoid this morning, but it went away on the next scrape. Mine was an I/O error. This has happened a few times recently with my downloads from demonoid.
Also you should be able to see more about the error if you hover over it.
