Screen Sharing turns itself off!

This is an issue that has turned up since moving to lion.
I have scren sharing enables in System Preferences > Sharing on my office mac and home mac. Sometimes I will try to screen share with one or the other mac and the Screen Sharing app will launch and just sit at the "Connecting to Home/Office Mac.." window for a while and then a Connection Failed window pops up telling me to enable screen sharing on the other mac.
When I get to the other mac, Screen sharing has been disabled and it wont allow me to re-enable it without restarting the computer. This same thing happens on both of my macs, so it doesn't seem to be an isolated incident. It happens fairly frequently.
Has anyone ever experienced this or have a solution?
Thanks

Try this on both machines and test to see if it works. If not, you may need to run an update if not done so already.
Open System Preferences > Sharing
Turn OFF Screen Sharing, Remote Login, Remote Management, and Remote Apple Events (just turn everything off)
Now turn ON Screen Sharing, Remote Login, Remote Management, and Remote Apple Events
Now turn everything OFF again. We have just "kickstarted" those services.
Now enable the services you want. If you just want to access your computer through VNC or screen sharing, just turn on Screen Sharing.

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Message was edited by: paulcb

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I have an article here that can help you troubleshoot this issue with your iPhone. The article is about troubleshooting a multitude of iPhone hardware issues, and can be found right here:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
The specific section you will want to reference can be found here:
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
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Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
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If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
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Thanks for coming to the Apple Support Communities!
Regards,
Braden

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