When I had that problem I found the answer at
http://search.cpan.org/~joesuf/libapreq2-2.07/FAQ.pod
which says:
Be sure your server config contains a line like:
LoadModule apreq_module modules/mod_apreq2.so
--John.
I am in the process of moving to modperl2 and was tripped up by the
problem with @PerlConfig that Apache2::PerlSections has. I came across
your post from last October but it does not look as though the fix you
suggested then has been taken up.
As per your post, there are two issues here