Since this an ISP issue, I am directing you to the Comcast help forums. Those forums are provided to Comcast customers, and are a great resource for vendor specific issues. There are forums for computer issues, email issues, security, internet, cable tv, and CDV.
Many times we, the users there, can provide answers tech support and customer service can't.
It's mainly a user-to-user forum, but lately Comcast has added more employees as moderators who can also help with issues.
Click the link below, you'll be sent to the sign in page. Log in with your Comcast user ID (the part before .net) and your password. You will next see a first time forum users page, asking you to choose a screen name for use in the forums. Once you set that up, you'll be taken to the actual forums. http://forums.comcast.net/comcastsupport/
Post your issue in the CONNECTION forum.
(Once you get to the forum, save the page to your favorites. If you want to get to it from the Comcast home page, you have to jump through hoops to reach it)
Edited by Queen-Evie, 09 September 2008 - 06:59 PM.