Squid Ftp Proxy with IE 6 ?

[Noc Phibee <noc@xxxxxxxxxx>]

Hi

i have a big problems with my users ;=)

   1- If i don't delete the file browser option into the IE 
configuration, my user can see
      the ftp server with Squid
   2- If i delete the file browser optiuon, my user can Upload on the 
ftp server ..

Anyone know why IE don't use really the FTP Proxy configuration for a good
work with Squid ?

Thanks