I have apache and php on my fc4 machine and they work very well. My friend has recently installed apache and php 5.1.2 on his windows machine. he teste it using phpinfo() and it works fine. then he copied exactly the same php applictation from my computer. in the application there is a page for loging in to the system. when I enter my username and password I the page cannot be displayed due to wrong information in address bar which looks like this:
http://172.16.4.19\/index.php

When I open it using internet explorer I can login and log out as well. but when I want to do another thing I get error abourt headers and so on.

I don't use mysql or any other program.

I think something must be changed in httpd.conf about differences between linux and windows in \ and /.

I know that it is not a good idea to install such programs on windows but my friend is a newbie and it's his computer.