Suddenly can't connect to shared computers or screen share

For some reason I can no longer connect to my shared computers. I can however connect to MY computer from my shared computers, if that makes sense.

From my own computer, when I go to my shared list in the finder, I click on a computer (normally it all automatically connects because I have the password remembered), I click "connect as" and I never get any response, sometimes a "connection failed" I know file sharing is enabled on all computers.

Is there a way to refresh my list? What can I do to reconnect to my shared computers? This seems to have been happenings since I last updated the OS.

Also, I can no longer do a screen share where I was doing this regularly every day.

Thanks

Dan

Message was edited by: Daniel Peck