* The argument to Net::FTP->new() is the hostname, which should be an IP address (e.g. '26.190.158.98') or a hostname (e.g. 'ftp.yourhost.com'). So it looks to me like your "bad hostname" error message is correct and your hostname is just malformed.
* Should probably change $File to something like $ftp so it's not misleading.

for reference, from Net::FTP docs (looks like this is exactly the functionality you need):

           use Net::FTP;
           $ftp = Net::FTP->new("some.host.name", Debug => 0);
           $ftp->login("anonymous",'-anonymous@');
           $ftp->cwd("/pub");
           $ftp->get("that.file");
           $ftp->quit;
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Update: Btw, you said you wanted to go from a ftp server to a client machine, but your sample code has a put() call and not a get() ....