Apache doesn;t restart

Hello all I have recently installed apache 2.0.50 and its patches. (on Suse 9.2 Pro) The problem is that i cannot restart apache. If i make a configuration in a file (say /etc/apache2/vhosts.d/secure.conf) then it cannot "see" the changes i made to that file. However, if i make i "type" a mistake then apache warns me that the syntax is not ok. After that i run rcapache2 restart and the new configurations cannot be seen by apache. Do you know why this happening?