Windows cannot locate the server copy of your roaming profile and is attempting to log you on with your local profile. Changes to the profile will not be copied to the server when you logoff. Possible causes of this error include network problems or insufficient security rights. If this problem persists, contact your network administrator. DETAIL - The network name cannot be found.

SOURCE: Windows cannot locate the server copy of your roaming profile and is attempting to log you on with your local profile. Changes to the profile will not be copied to the server when you logoff. Possible

When you "logon" to your local network, your computer is configured to fetch your "desktop" (My Documents and wallpaper and everything else) from a "server" computer on your network.

Was your "logon" to the local "domain-server" a successful login?
Does your local Network Administrator indicate that the "domain-server" is functioning properly?
Does that server's log-file show any error-messages, such as "not allowed to login between 10 PM and 6 AM" (a "security" setting on the server).

Since your "desktop" could not be loaded from the domain-server,
your computer has used a "local" copy of your "desktop",
and it is warning you that any changes will *NOT* be "merged" back to your "network" profile.

Have you contacted you local Network Administrator? What did she say?