I've come across this issue before. I can't say definitively, but unless you're having connection issues from your ISP (which is doubtful) I'm guessing the problem is with Boardhost, which is where SOWNY originates. I've seen this before and way too often.
Sometimes, they just go down for no apparently reason, only to resurface a few minutes later. I've contacted them repeatedly about this but they're not exactly known for their customer service and I have never received a reply back.
My only advice is to try this:
Go to isitdownrightnow.com and paste in the SOWNY address you use to access the site from your menu bar. This will tell you whether the server is down or whether it's local to your machine.
The other thing is try it a few minutes later. For all their silence, the Boardhost outages do not often last long and thankfully don't happen that often. It just feels that way!
Though it's not my fault, I'm sorry for your trouble!