Login failed for user '(null)' - Not associated with a trusted connection

We had a DTS package that was working fine until yesterday and since
today it does not work and we get the following error message:
[Microsoft][ODBC SQL Server Driver][SQL Server] Login failed for user
'(null)'. Reason not associated with a trusted SQL Server connection.
Please clarify how do we fix this problem.
Thanks
Karen
Hi
Did you change Authentication mode of SQL Server?
<karenmiddleol@.yahoo.com> wrote in message
news:1118220803.108259.111330@.f14g2000cwb.googlegr oups.com...
> We had a DTS package that was working fine until yesterday and since
> today it does not work and we get the following error message:
>
> [Microsoft][ODBC SQL Server Driver][SQL Server] Login failed for user
> '(null)'. Reason not associated with a trusted SQL Server connection.
>
> Please clarify how do we fix this problem.
> Thanks
> Karen
>
sql