Internal versus External Viewing of Web Pages

[TimP]

I've got a database with linked web pages in it that naturally open in the internal browser.

I've also got a csv file with a whole bunch of web pages (Item Titles and URLs) that I'd like to import and to open in the internal browser. No matter what I do after importing them, seemingly successfully, I can't get them to open internally. When I click on one of the items I've imported, there's the link "Click here to open linked document" displayed in the item detail. Now, I've been careful to import to document-type items and I've used the two item attributes "Item Title" and "URL" only.

Can you tell me what the heck I'm doing wrong here?