ODBC Error: Data Source Name not found

I hope this is the place to post errors, and solicit help…if not,
my apologies…

I inherited a RoR app, and it was working great for the longest
time…however, i have recently started receiving the following

A DBI::DatabaseError occurred in repairs#edit:

IM002 (0) [unixODBC][Driver Manager]Data source name not found, and
no default driver specified
/usr/local/lib/ruby/site_ruby/1.8/DBD/ODBC/ODBC.rb:95:in `connect’


As background: I have very little RoR skill…I dont have root
access to the linux server that this app runs on…I can get to the
app directory, though. the server team rebooted the host, and after
that this started happening. We are using FreeTDS for ODBC
connections. I have freetds.conf, which i can post, along with the
repairs_controller.rb file, and the database.yml file…I am pretty
sure that the problem lies in one of those. I suspect that something
happened with freetds, since I have changed nothing within the

If some one could help me, that would be great…again, if needed, i
can post any files you think would help…