WT1200LE upgrade issue

I’m trying to upgrade a WT1200LE from version 4.2.137i to the final release of 5.2.069.

in my ftprootwnoswnos.ini:

#This will prevent the user being asked to log in to the local device
signon=0
EnableLocal=0
#This will upgrade to firmware if a newer version exists ing the ftp directory
AutoLoad=1

#Set correct language
language=au

#Set screen resolution
#Resolution=1024×768 Refresh=75

#Set wallpaper
Desktop=Wyse.bmp

In the 4.2.137i version of the firmware, I only have the option of putting the file server IP in, which I did.

Here are my FTP server logs:
000003) 6/29/2009 11:30:19 AM – (not logged in) (10.1.1.76)> USER anonymous
(000003) 6/29/2009 11:30:19 AM – (not logged in) (10.1.1.76)> 331 Password required for anonymous
(000003) 6/29/2009 11:30:19 AM – (not logged in) (10.1.1.76)> PASS *******
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> 230 Logged on
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> TYPE I
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> 200 Type set to I
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> SIZE /wnos/wnos.ini
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> 213 321
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> PASV
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> 227 Entering Passive Mode (10,1,1,66,15,205)
(000003) 6/29/2009 11:30:19 AM – anonymous (10.1.1.76)> disconnected.

The thin client logs into the FTP fine, but doesn’t do anything. I’ve upgraded other thin clients the exact same way without issue (the wnos.ini may have been a little different).

Thoughts?