FTP downloads to server timeout after 60 seconds

I haven't seen anyone post about this, so here goes.

SBS 2003 R2 SP1 Standard w/2 NIC configuration

The server has no other issues, everything works fine.
There is a 3rd party POS program that runs on the server that uses FTP
to download updates to the program's database. The software company has
contacted me because the updates fail to finish downloading.
After testing this myself by downloading various file sizes from
ftp.microsoft.com, I found that smaller downloads (25 to 50meg) were
completing successfully but larger files (75-100 meg) were not. Further
testing from other sites narrowed it down to be a window of about 60
seconds. Anything that takes longer than that fails. Since the software
company's FTP server must run much slower than Microsoft's, their files
can't download within the 60 second window.

I've used the FTP in Internet Explorer and the command line FTP with
similar results.

Knowledge base articles pointing to the Application Layer Gateway
service haven't panned out. If I disable the service, neither the program on
the server nor the client stations can run the POS software at all. (The
application is only installed on the server for configuration purposes.)

Even though it appears to refer to FTP problems on the clients, I tried the
registry setting in the Knowledgebase article 931130 - Error message when
you use an FTP client to download a large file from an FTP
server:"Connection closed by remote host". This has made no difference,
though it seems to explain the behavior.

The bottom line seems to be there should be way to extend this beyond a
60 second timeout somehow. If any one has seen this or has an idea any help
would be appreciated.

Thanks


.

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