I think Vista occasionally has problems with console menus in games. (For example the console in Counter Strike Source doesn't open on some Vista installations.)
You could try updating to the latest version of Vista. I'll try to find a link for you.
Here's the link,
http://windowsupdate.microsoft.com/
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Confront the evil river you can't control
Wicked ways and venomous eyes
Just human nature in disguise..."- Clouds over California