Help! can't retrieve node by using Weblogic 9.2 CMS (content management)

[Hai Lin]

All,
I need your help for figuring out my problem now. I'm using weblogic 9.2 now, I put two very simple plain document under BEA Repository. And in my java file, I try to retrieve this two document by using weblogic 9.2's CMS API, the code is straightforward as below:
...
ITypeManager typeMgr = ContentManagerFactory.getTypeManager();
//request is HttpServletRequest
ContentContext ctx = new ContentContext(request);
ISortableFilterablePagedList typeList = typeMgr.getViewableTypes(ctx, "BEA Repository");

But why the typeList is always empty? I should get two types since I have two documents there.

Thanks in advance.

Hai