question about sqlite3-ruby on linux

first sorry for my poor english.I have a question about sqlite3-ruby on
I have compiled and installed the ruby 1.9.1, sqlite3 and sqlite3-ruby on
redhat enterprise version.
but when I use irb and import the sqlite3 module, it will throw the error,
what's the matter.

irb(main):001:0> require 'sqlite3'
LoadError: cannot open shared object file: No such file or
directory -
`rescue in <top (required)>'
`<top (required)>'
        from (irb):1:in `require'
        from (irb):1
        from /usr/ruby1.9.1/bin/irb:12:in `<main>'



I hava solved this problem, use the fellow method:

sudo ln -s /usr/local/sqlite-3.3.5/lib/

then it works fine~

thanks everybody~