IChat screen sharing stopped working

Me and my girlfriend have identical Macbook Pros, and we've been utilizing the screen share capability of iChat for about a month and a half now. Today her capability to screen share stopped working. Nothing has changed recently, we haven't changed any system settings (that we know of) my screen share is still an option, but her screen share is greyed out. Screen sharing enabled is checked on her video option so we really have no idea what else to do. Any ideas?

Hi,
She should do a Speed test
http://www.speedtest.net/ (Use the Yellow Star in the main window)
Are the reported speeds near what she pays for ?
(they are typically shown at about 80% of what the ISP claim to supply)
Try cutting the power to the computer, any router and modem then start them up Modem first, then router then Computer, allowing things to be come established at each device and see if things improve.
If that does not work she should delete com.apple.ichat.plist and then restart iChat.
8:06 PM Wednesday; February 24, 2010
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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    Message was edited by: Changren Yong
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    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
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