HT3275 I get the following message - "Time Machine could not complete the backup."  "Unable to complete backup."  "An error occurred while creating the backup folder.""

I get the following message - "Time Machine could not complete the backup."  "Unable to complete backup. An error occurred while creating the backup folder."" 
This MAC is partioned with Windows 7 with only  50 gig devoted to Windows so my son can play Flight Simulator X on the machine. 
I have a WD Passport External Hard Drive for the Back Up
I have spoken with WD Tech Support and they have been fantastic but I still keep getting this message.  Any thought?
Maxx

Reboot the TC.. it sometimes gets lost on the network.. are you still actually using 10.6.8 as the problem is more prevalent on Lion and ML it seems is no better.
You might find reset of the TC is needed. change the names to short, no spaces pure alphanumeric.
Reset the TM to the new name.. use the A4 in Pondini's great KB.
http://pondini.org/TM/Troubleshooting.html

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