Self-assigned IP address, try to connect to pc

I do a lot of file transferring from my mac to another pc laptop, so I've got them hooked together with an ethernet cable.  I had this issue in the past, where I'd try to connect but my network settings kept saying the "ethernet has a self-assigned IP address and will not be able to connect".  The solution I found to fixing this was to open up the Advanced Settings, and change the IPv6 configuration to "Link-local only" and then everything would work perfectly.
I upgraded to Yosemite yesterday, however, and now that solution no longer works.  Still getting self-assigned IP.  How can I fix this??

I checked my sharing options, and everything looks to be on.  I also have the yellow circle, but I can never get a connection unless it goes green.  Before I upgraded, that was the issue before; it would be yellow until I changed the IPv6 connection to "link-local only" and then the ethernet connection would change to green, and I'd have no issues.  Now, when I change it to "Link-local only" and hit apply, nothing happens, it's still yellow.
I tried to connect to the server just to see, and it won't connect.  I get an error that says "There was a problem connecting to the server "AMANDA-PC" Check the server name or IP address, and then try again.  If you continue to have problems, contact your system administrator."

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    hey, for some reason i turned on my macbook pro 2012 and it says i have no internet access. I then found out that it also says that my self assigned ip address will not connect to the internet. How is this and how can i fix it?

    Reset your modem.

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