Dbi & ODBC seg fault

[gus@comp gus]$ ruby -v
ruby 1.8.1 (2004-03-31) [i586-linux-gnu]

[gus@comp gus]$ cat test_dbi.rb
require 'dbi’
DBI.data_sources(“dbi:ODBC”)

[gus@comp gus]$ ruby test_dbi.rb
Segmentation fault

In ~/.odbc.ini I have configured a DSN to access a MSSQL 2000 server
using freetds. The parameters are good as I can using dbi, connect to
the database and retrieve data.

Any idea?
Guillaume.