Some questions for you to answer to help diagnose this problem:
Has it ever worked right?
Which exact WDTV model are you using?
What OS are you using, and what version?
Are you trying to access a computer for dat, or a drive – where is the drive located?
Are you getting this message from Network shares or Media server access. For all media or certain types.
These two links of mine may help:
You don’t need to use a user name and password to access, if:
