This is the error I get in response to the command

DTSRun /S machinename\Tstradli /E /N DoPost

Error: -2147467259 (80004005); Provider Error: 17 (11)
Error string: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exi
st or access denied.
Error source: Microsoft OLE DB Provider for SQL Server
Help file:
Help context: 0

On a seperate note how do I switch SQL Servers autentication mode from windows to SQL Server?