> USER2 (Client) Thu Mar 26 10:27:41 2009
> INET/INET_connect: gethostbyname failed, error code = 11001

MSDN says:

WSAHOST_NOT_FOUND
11001
Host not found.
No such host is known. The name is not an official host name or alias,
or it cannot be found in the database(s) being queried. This error may
also be returned for protocol and service queries, and means that the
specified name could not be found in the relevant database.

> Should the problem caused by these OS configuration or there's some
> wayout to eliminate this message ?

Show us connection string you are using.

SY, SD.