Trying to use AR with Oracle Instant Client: ruby-oci8 fails to load

I am trying to establish a connection to oracle through ruby-oci8 with the intent on using ActiveRecord.

I have Oracle instant-client installed in the usual system location.

I have these gems installed in my user space: activerecord (2.3.2) activerecord-oracle_enhanced-adapter (1.2.0) activesupport (2.3.2) dbi (0.4.1) deprecated (2.0.1) fastercsv (1.4.0) gnuplot (2.2) rake (0.8.4) ruby-oci8 (2.0.1)

When I try to require 'ruby-oci8', I see this odd error:

irb(main):001:0> require 'oci8' LoadError: /usr/lib/oracle/ cannot restore segment prot after reloc: Permission denied - /home/iono/ packages/gems/gems/ruby-oci8-2.0.1/lib/         from /home/iono/packages/gems/gems/ruby-oci8-2.0.1/lib/         from /home/iono/lib/ruby/rubygems/custom_require.rb:31:in `require'         from /home/iono/packages/gems/gems/ruby-oci8-2.0.1/lib/oci8.rb: 25         from /home/iono/lib/ruby/rubygems/custom_require.rb:36:in `gem_original_require'         from /home/iono/lib/ruby/rubygems/custom_require.rb:36:in `require'         from (irb):1

Any ideas?