Trouble with "require" and FastCGI

I didn't mention in the subject that I'm using Firebird because I'm hoping non-Firebird developers will read this since there only seem to be about four people using Rails with Firebird. First what works for me - WinXP/Rails/Apache/FireRuby works great. I've also got WinXP/ Rails/Apache/FastCGI working well. When I mix FastCGI and FireRuby I blow up with this:

126: The specified module could not be found. - C:/ruby/lib/ruby/ gems/1.8/gems/fireruby-0.4.1-mswin32/lib/fr_lib.so

The top of the call stack looks like this:

C:/ruby/lib/ruby/gems/1.8/gems/fireruby-0.4.1-mswin32/lib/fr_lib.so C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:33:in `require'

The file referenced in the error does exist. I'm betting this is something simple, but I've been banging my head against it for many hours. I'll take any conceivable suggestions happily.

Thanks, Kevin Donn