I want to use Interbase with WebObjects, and the ER modeling part,
requires a JDBC driver that conforms to JDK 1.1

I've tried using the latest version of InterClient, but it is not
recognized.

So I'd like to try the above.. my understanding is that there was a
version called 1.12 and a later one called version 1.50. I'd be
grateful if someone could provide either (preferably both!) of these.