What you're saying about the achewood site responding to a ping sort of makes sense I think. Your network can 'see' achewood but asking for its webpages calls the silly filter into play and that sends down its 'you're blocked, fool' message to annoy, instead of lovely achewood funnies.
I think there's a DNS problem somewhere in your company's network/on your local computer so electrical just can't be found as its name can't be resolved to its address.
You could try to clear out your machine's dns entries: >run>cmd>ipconfig /flushdns
then try EA again.
If this doesn't work, can you do a run>cmd>ipconfig /all to check what DNS server your computer/company is using? I'm guessing it'll be an internal (company based) one.
If you can adjust the network connections on your computer (control panel> network connections>local area connection -right click>properties>TCP/IP>properties> use the following DNS server) you could try an external one to see if this would let you connect.
I've used open DNS' before but there are a few here:
http://theos.in/windows-xp/free-fast-pu ... rver-list/
Of course if you can't get in to network connections properties then that's knackered.
Sorry for the waffle.