If you can connect to East then you have no problems... You're restricted from USWest, I was under the impression you couldn't login anywhere either way.
Alright then.. Most likely a firewall. Can you try running in Selective Startup? This will stop other programs from running in the background. To run in Selective Startup, view the link below:
Windows:
(http://us.blizzard.com/support/article.xml?articleId=21052).
Macs:
(http://us.blizzard.com/support/article.xml?articleId=21123).