Yosemite can't connect to my NAS & other weirdness

Hi
I'm running Yosemite 10.10 on an Early 2011 15" Macbook Pro i7 with 8GB of RAM. The machine is connected to the network via Wi-Fi and my network is managed by a SKY router. All devices are configured to use DHCP to obtain their IP address from the router.
I have two NAS boxes on my network, a Western Digital MyCloud and a Buffalo Linkstation Pro.
Since upgrading to Yosemite I cannot access the Linkstation NAS box.
I can ping it on the network and I can call up the configuration pages in a web browser using the ip address, I can also access it from windows devices.
However if I try to connect to it using my mac it fails every time.
I use Go->Connect to Server then put in the details of the share, I'm prompted for a user name and password as expected but then the process stalls for several minutes before finally failing with the following error message.
'There was a problem connecting to the server "xxxxxxx"
Check the server name or IP address and then try again. If you continue to have problems, contact your system administrator.'
I've tried specifying smb, cifs, and even afp in the connection attempts but they all fail.
The Western Digital NAS works OK although it's a bit slow to make the initial connection.
The other weird thing is that my Macbook keeps changing it's NETBIOS name and I don't know why. I named the machine ChristophersMBP but it keeps getting numbers appended to the end of it. It's currently up to ChristophersMBP5.
The whole thing is very frustrating especially as if I boot Windows 7 using bootcamp it attaches to the share without any problems.
And help or advice would be greatly appreciated.

It looks like I've found, if not a fix, then at least a work around.
I was searching around the web and found other people having the same problem with their machine name changing.
The fault seemed to be caused by "Wake on LAN" being enabled on the machine. I checked my machine and, sure enough it was enabled.
Quite why I'd want wake on LAN enabled on a laptop I'm not sure so I had no problem with disabling it.
I disabled wake on LAN, renamed my computer again and rebooted it.
Now I find I can successfully connect to my NAS box!
This is a guess but I wonder if the renaming was causing problems with DNS or reverse DNS lookups?

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