How do I use Skype directly through the vbulletin interface?

[eternal_]

I'm confused about Skype through vbulletin - Do I have to have the skype system uploaded into the vbulletin system somehow, to allow users to use the buttons for chatting, talking through vbulletin? or do the users have to just use their external application of skype on it's own, not through vbulletin?

I'm confused because when I click on the skype button in someone's user profile all that happens is a popup box with all the buttons and a white field that says "I'm not Telling" in it and at the bottom of the popup box it says "These functions require Skype? to be installed."

When I click on any of the buttons it just says to open my skype program and use it from there. So what are the skype buttons doing in the vBulletin popup if I can't even use them through the system?

I'm stumped.