Apache 1.3 has Problems under WIN2000

It seems that a HTTP GET of any File bigger then the first chunk, fails if you request via a cgi perl-script. There are no errors reported. You can only stop and start the Apache Server to (most of the time) end the perl script.
Perl Version is 5.6.
LWP::UserAgent is used for Request.

the Same script works on AIX with Apache 1.3.

I think this a very poor Implementation.