Strange FTP batch error

We are getting a strange error when we try to FTP a save file to a
customer using a batch FTP script. If i use interactive FTP. I am able
to log in fine using the same user id and password. I cannot figure
out what i am missing or if there is something else i need to setup at
on the FTP configuration to allow this

Here is the  error log

Output redirected to a file.
 Input read from specified override file.
 Connecting to remote host 10.110.XXX.X using port 21.
 220-QTCP at XXXXXXXX.com
 220 Connection will close if idle more than 5 minutes.
 Enter login ID (kthiruma):
 331 Enter password.
  OS/400 is the remote operating system. The TCP/IP version is
"V5R3M0".
 250  Now using naming format "0".
 Enter an FTP subcommand.
 > USER APPUSER ********
 331 Enter password.
 530 Log on attempt by user APPUSER rejected.


After doing some research on some IBM documentation, i came across
this in one of the IBM cover letters for V5R3M0. I have verified that
the job description and the user is authorized to the libraries in the
job description.

When trying to log in to your FTP server on your IBM(r) eServer™ i5 at
V5R3M0, one of the following messages may be issued:
o       530 Log on attempt by user XXXXXXXX rejected. Login failed.     
o       530 Not able to set ASP group for user XXXXXXXX. Logon rejected.        
These messages are typically caused by one or both of the following:
o       The job description specified in user profile XXXXXXXX is not a
valid job description (for example, wrong library, spelled
incorrectly, and so on).
o       User XXXXXXXX does not have authority to one or more of the
libraries in the job description's library list.
Correct these issues, and the user will again be able to log in
successfully to the FTP server.



--
Krish Thirumalai