Constantly get "The connection to the host was unexpectedly lost."

When I try to use IChat at home on my PowerBook I get "The connection to the host was unexpectedly lost." as soon as I try to connect. This does not happen at work though. It works fine at work.
I thought it might have something to do with the different ISP's or Router settings on my Netgear wirless router. (At home I connect via ethernet cable.) However it WILL work at home about 5% of the time.
ANy Ideas to troubleshoot?

Hi Scuba Dan,
Check that Systrem Preferences > Quicktime > Streaming tab has the drop set to your Download speed.
http://www.ralphjohnsuk.dsl.pipex.com/page4.html#_quicktime
Also check iChat > Preferences > Video Section Bandwidth drop down is set to NONE.
http://www.ralphjohnsuk.dsl.pipex.com/page4.html#_bandwidth
These two will cap iChat if not set properly.
As Defcom says if these settings are correct you may have a modem that is having trouble wiith forwarding port 5190 on both TCP and UDP protocols.
Changing the setting he mentions drops the login below any Port Forwarding and NAT involvement on your modem and router.
Having said that avoiding NAT and Port forwarding by using UPnP is another way around this. Most Netgears have UPnP enabled as default. You don't need Port Forwarding ANd UPnP. Disable the Port Forwarding settings by Unchecking them.
For others,
Zyxel devices are prone to needing port 443, as are newer devices that want protocols to be set when Port Forwarding.
10:56 PM Tuesday; October 17, 2006

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    Message was edited by: migueliguel
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