Netshield for Netware 4.63 cannot update

[Bendeguz]

I have installed Netshield for Netware 4.63 for five different novell server 6.5 sp4.

4 of them is OK, but the last cannot update. I use the same setting:
ftp, target is given by ip adddress, not anonymous password, but i check it many time.

The server log to ftp, realize that there is a new dat, but cannot update.
From the activity log:

Monday February 27, 2006 12:00 pm AutoUpdate Try Passive FTP to 10.1.252.40
Monday February 27, 2006 12:00 pm AutoUpdate Now retrieving file "update.ini"
Monday February 27, 2006 12:00 pm AutoUpdate Existing DAT Version 4.0.4511
Monday February 27, 2006 12:00 pm AutoUpdate DAT Version 4.0.4705 is available
Monday February 27, 2006 12:00 pm AutoUpdate Connecting to 10.1.252.40 for update
Monday February 27, 2006 12:00 pm AutoUpdate Try Passive FTP to 10.1.252.40
Monday February 27, 2006 12:00 pm AutoUpdate Now retrieving file "dat-4705.zip"
Monday February 27, 2006 12:01 pm AutoUpdate Connecting to 10.1.252.40 for update
Monday February 27, 2006 12:01 pm AutoUpdate Try Passive FTP to 10.1.252.40
Monday February 27, 2006 12:01 pm AutoUpdate doFTP Could not CD to target directory pub/antivirus/datfiles/4.x/
Monday February 27, 2006 12:01 pm AutoUpdate Try Active FTP to 10.1.252.40
Monday February 27, 2006 12:01 pm AutoUpdate doFTP Could not CD to target directory pub/antivirus/datfiles/4.x/
Monday February 27, 2006 12:01 pm AutoUpdate Directory does not exist on the remote FTP server.

The error is true, there is no that directory but all the other servers use the same repository to update.

I try to make a copy of the full update directory to the given path:
pub/antivirus/datfiles/4.x/

After that a gave a different error message:

Now retrieving file "dat-4705.zip"
Error extracting one or more files from the FTP obtained archive.

But i can extract the zip file by hand, so i'm sure that the file is OK.

Any idea?