How do I use the debugger with mod_perl

I'm trying to attach the Perl debugger to Apache and mod_perl. Our environment is quite complex (lots of additional stuff (eg Catalyst) configured with Apache) and the engineers who configured it are no longer with the company. I've followed the instructions on the Apache web site, setting 'PerlFixupHandler Apache::DB', etc. but so far all I get is a break into the debugger after the page has been delivered. I'm guessing that I get the break in the dispatch process, not the worker process. I'm running the prefork MPM version of Apache. The instructions for debugging say pass the -X parameter when starting httpd. But the httpd I'm running doesn't accept a -X parameter. Я предполагаю, что параметр -X действительно приведет к тому, что некоторые версии httpd НЕ будут разветвляться?

Любое руководство приветствуется.

$ ./httpd -v
Server version: Apache/2.2.17 (Unix)
Server built:   Nov 16 2010 20:13:24

-X isn't listed when I do httpd -?    
Usage: ./httpd [-D name] [-d directory] [-f file]
           [-C "directive"] [-c "directive"]
           [-k start|restart|graceful|graceful-stop|stop]
           [-v] [-V] [-h] [-l] [-L] [-t] [-T] [-S]