NAS attached to Windows Server 2003

Hi,

I bought a couple of days ago a Share Space from Western Digital and I am trying to backup my Windows Server 2003, I am using the backup utility that is bulit in on Win 2k3. The server can detect my NAS device and even i can copy some small files, however, at the moment of copying my backup file to the NAS folder, after some GB that are copied, the backup is interrupted.

I annex the logs from the NAS device in order to give more info about the problem. My servers are calle pdea-srvr01, 02 and 03.

regards