Ok, I have a few more details on this issue.
Since my VB board is part of a totally private site, I have it set so that guest cannot browse the board. Basically, there is no guest account.
So, if you're not logged in, you're immediately taken to the login window. Since this is being done as an include, it looks like I'm going to have to edit the template pretty heavily to get it to work correctly. Right now there are broken images and the re-directs aren't working.
I'm getting closer.