In addition to the above, try loading your module before using it as a handler. This will cause Apache to not even start if there are problems with it and thus catch your problem (with a better error message) earlier.
in reply to Re: Apache/mod_perl2 : "failed to resolve handler"
in thread Apache/mod_perl2 : "failed to resolve handler"
or in a startup.pl
-- More people are killed every year by pigs than by sharks, which shows you how good we are at evaluating risk. -- Bruce Schneier