Connecting to iMac on local network...

Greetings...I had file sharing between my MBP and iMac working (I swear). Now I cannot connect to the iMac from my MBP. In Finder, I see the iMac on the side bar...but when I attempt to connect, I get a "Connection Failed..." message. When I click the "Connect as..." button, I get the same error.

I have tried turning off the file sharing on the iMac and re-enabling it....but get the same connection failed message.

Any direction is appreciated.

btw...I can connect from the iMac to the MBP without any error.

 

Update...

After clicking the "Connect as..." button in the finder window, I received this error message:

"Connection failed. This server may not exist or it is not operational at this time. Check the server name or IP address and your network connection and try again."

Is there a Network-type plist that I can delete?