When trying to use sharing, I get Connection Failed

When trying to use my OSX 10.75 laptop to access files on my OSX 10.6.8 laptop it says "Connection Failed". In the console, it says:

Finder: SharePointBrowser::handleEnumerateCallBack returned -6600

File sharing is turned on in the target computer. I have a user account setup for file sharing. That user account has read/write access setup.

I have tried to turn off sharing and turn it back on.

I have tried to remove the shared folders, make new folders and then share those new folders.

I have tried both guest access as well as access with a specific user account.

Nothing works. I get the error message above no matter what I do.