Site works in IE not FF

[shadrach]

I can log into my site via Internet Explorer, but when I use Firefox I get:

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The browser could not find the host server for the provided address.

    * Did you make a mistake when typing the domain? (e.g. "ww.mozilla.org" instead of "www.mozilla.org")
    * Are you certain this domain address exists?  Its registration may have expired.
    * Are you unable to browse other sites?  Check your network connection and DNS server settings.
    * Is your computer or network protected by a firewall or proxy?  Incorrect settings can interfere with Web browsing.

I'm not having issues with any other site in FF either. Any ideas?

[Ken.]

shadrach, please look at the posting guide for this board and update your question with the info asked for in the guide.

Is this a question for SMF maybe?