SharePoint和Enterprise Library 4.0

Has anybody been successful in integrating the Enterprise Library v4.0 with SharePoint WSS 3.0? I created a very simple .ASPX page. It's only purpose will to be to connect to an Oracle database and display some values in a DropDownList. But right now, all it does is displays Hello World. I've added the necessary references and everything compiles fine. When I test the page, it displays Hello World. But once I add the using Microsoft.Practices.EnterprisesLibrary.Data, the page no longer works. I just get the standard Unknown Error message. Is there a log file I can check? Has anybody been successful in integrating the