Hi Rob,
first of all, sorry for my late reply and thanks for your quick reply.
at the end, here is the my answers;
my versin of Net::FTP is 2.75 which is result for (  perl -MNet::FTP -e "print $Net::FTP::VERSION")
and I am sorry to put wrong error line, actually I copied my code to the another Linux box and tried there. But I got still same or above Timeout message above.
finally, The correct error message in the Windows machine is;  Timeout at D:/perl/lib/Net/FTP.pm line 503 and the line 503 is  last unless $len = $data->read($buf,$blksize); ok. I think, I answwered all questions... How can I proceed to solve this issue ? Thank you very much for your quick reply and answers... Bulent Sahin.