I am trying develop clustered environment in Jboss 7.1.1. For mod_cluster setup I have done the following steps. Downloaded httpd 2.4 placed @C:\Apache24 Placed below .so files in C:\Apache24\modules mod_proxy.so mod_proxy_ajp.so mod_slotmem.so mod_manager.so mod_proxy_cluster.so mod_advertise.so Using cmd, when I run C:\Apache24\bin: httpd.exe am getting below error and apache is not getting started. httpd.exe: Syntax error on line 528 of C:/Apache24/conf/httpd.conf: Cannot load modules/mod_slotmem.so into server: The specified procedure could not be found. Could anyone provide the solution? Thanks