fcgi errors when starting rails with lighttpd server on Mac OS X

When I do a script/server, lighttpd boots, successfully, even, but
displays the following message:

/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing': uninitialized constant RailsFCGIHandler (NameError)
        from
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing'
        from /Users/alpaca/rails/test/public/dispatch.fcgi:24

I Googled said message, and found that the error is allegedly caused by
FastCGI not being installed, but I specifically went back and made sure
that fcgi, its ruby hook, and the appropriate gem were all installed,
all inside /usr/local.

I'm running Mac OS X 10.4.8 with a PowerPC processor, latest version of
everything except mysql, which is 5.0.19 and shouldn't impact anything
anyway.

Any help would be greatly appreciated.