IE8 Developer Tools won't open

Just installed IE8 on WinXP. Trying to use the Dev Tools but, clicking on the menu item or hitting F12 doesn't do anything. I can开发者_开发问答 see the option in the tools menu, just can't use it.

I've checked to make sure it wasn't opening minimized or off screen and I've checked the registry settings used to disable them. Those registry keys don't even exists.

Suggestions? I was going to reinstall, but, thought I'd check here first.

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Like I said in my post, those registry keys don't exist, so, nothing there to delete as mentioned in the post you linked to.