I just deleted the folder and carried all the steps from gunzip to ./configure.Now /usr/local/apache2/bin/httpd -v command shows the version of apache and date.I think its working.
my next problem is i have to connect this unix system to a network.Actually unix system was a system with windowx xp, we formated it and installed freebsd.Now i need to connect to the network, how to follow.thanks in advance