Incorrect DNS server address

I have connected WDTV live on ASUS  WL-520CG router , altogether with other 3 notebooks. On notebooks I have good connection while on WDTV live connection works but only for some limited time. After that I get message:  Incorrect DNS server address.  After few hours it starts to work agan. What I should to do to fix it? I tried automatic setting and manual as well but nothing helps.


Did you try using Google’s public DNS server