Package not running on SQL Server Agent Job

Hi Experts,

I have created one package this just like exporting files to the FTP site. When I run manually it is running successfully and able to export files to the FTP site. 

I tried it through SSMS(integration services) when I run here it is working fine.

But When I set up this in the SQL Server agent Job it is failing. 

Note: This agent Jobs running under Admin Account and I have developed  the package under Admin account only 

It is throwing an error like this 

Message
Executed as user: XXXX\Administrator. Microsoft (R) SQL Server Execute Package Utility  Version 9.00.4035.00 for 32-bit  
Copyright (C) Microsoft Corp 1984-2005. All rights reserved.    Started:  09:09:45  Error: 2012-11-07 09:09:46.12    
 Code: 0x00000004     Source: Script to check whether the WamNet task succeeded or failed      Description: 
The Script returned a failure result.  End Error  DTExec: The package execution returned DTSER_FAILURE (1). 
Started:  09:09:45  Finished: 09:09:46  Elapsed:  0.968 seconds.  The package execution failed.  The step failed.

Any Idea please.