can't download ftp .gz files

Hi, I got squid-2.0.RELEASE , and my client is
Netscape-4.06 for win95
When I try to download an ftp file that's a .tar.gz
the file is uncompressed and showed in the screen.

If I try to do a save as the command tar xzvf doesn't
work, and it tells me it's not gzipped.

When I turn off squid it works.
I searched the archives and the FAQ and found nothing.
I apologize if I have missed something obvious.

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