OK, so where does one obtain this for Oracle XE ? Just trying to save flailing... Also, umm, the error message when the login fails is not very illuminating.

Thanks.

Update: So I installed the XEClient that I downloaded along with the XE server, and it can't do anything under Windows 7. It fails. PL/SQL Developer doesn't even see the TNSNAMES entries it used to show before I installed the XE Client.

Is there something magic I need to know?

Thanks again.