Apache won't start on NT4 ...

I just installed apachefriends XAMPP on my NT4 server. Because there is
already another webserver running on port 80 (an old Netscape Enterprise 3.6
server), I changed the Listen entry in the conf file to port 81. But for
some reason, Apache won't start. When I go to the DOS prompt and start
Apache.exe, there is no error message but Apache does not run. The log file
contains the following errors. I have no idea what this means. Ideas
one? -Michael
[Thu May 05 17:55:24 2005] [crit] (22)Invalid argument: unable to replace
stderr with error_log
[Thu May 05 17:55:24 2005] [crit] (2)No such file or directory: unable to
replace stderr with /dev/null
[Thu May 05 17:55:24 2005] [error] Init: Failed to generate temporary 512
bit RSA private key

ok, found it ...

http://www.apachefriends.org/en/faq-xampp-solaris.html