I always do like this

#!/usr/bin/perl
print "Content-type:text/html\n\n";
#html - document itself
[download]

It's really shame for me not to use CGI.pm. But I'm too new in Perl programming.

I've checked all my servers log - and only one error is there - "Premature and of script headers". And sometimes I get from perl errors that I'm trying to write on closed handler while it's full nonsense!!!But still he(perl) is writing in them . Bur this is not the main problem. Thank's to davorg - I'kk try everything he said about

Originally posted as a Categorized Answer.