Cannot execute ssis package from dtexec

I get this error when I try to run the SSIS package from command line

Error:

Could not load package "\Package1" because of error 0xC001000A.

Description: The specified package could not be loaded from the SQL Server database.

FYI : here is the command

/sql\Package1/server sree/conf"C:\data\Test\conf\Package1config.dtsConfig" /L"DTS.LogProviderSQLServer;sree.test"

Thanks,

sree