Visual Studio JavaScript Intellisense doesn't show tooltip

Question

Yet another problem.

I wrote a simple function which I commented, but tooltip with function summary doesn't appear when I highlight it in Intellisense dropdown.

However, if I add reference to this js file from another file, I see the sample function there, but again, not the summary tooltip. Any ideas?

I run VS 2008, with SP1, and the jsdoc patch, I did refresh Intellisense (Ctrl+Shift+J). I even reinstalled all that in my stubbornness, and I'm not going to sleep until I make it work, or bust this machine :)

function sample() {
    /// <summary>
    /// test
    /// </summary>
    alert('Work damnit!');
}