Fixed! Oracle 11G and SqlDataSource: The ugly 'ORA-01036: issue

I posted my problem on Oracle's OTN Discussion Forum (http://forums.oracle.com/forums/thread.jspa?messageID=2366331&#2366331) and got two great answers. It turns out that I was using Microsoft's Oracle provider, not Oracle's. Make sure you install Oracle's software and take care to select the right provider when creating a connection. Here's an example connection string for ASP.NET 3.5: