Making a 'child page' password protected when it holds a forum

A unique problem for sure...I have installed a plugin called XDForum. It's almost exactly like this forum...it's cool because it intergrated right into a blog should you have a need for both types of interaction/communication etc.

Herre's my problem/question:

I want my blog to have a totally private bulletin board forum "hiding" in my blog. The public can see a link on the menu/page bar or perhaps a link embeded in a side-bar test widget but if you click on it all you should see is a "password required" message and a box (perhaps some explanitory text). And then you put in a pass word and it takes you to the "secret forum".

I have tried to do this with a simple password protected page but strangly it does not hide the forum...I have also tried a child page but it makes a menu drop down item and I do not want that either.

How could I accomplish this design goal?

My site is:

www.NutritionWire.org and if you or anyone would like to see the forum (before I figure this out and you need a password to see it) just click on the menu bar item that says DACBN Forum.

Thanks Flynn...the checks in the mail!