IMessages not functioning on OS X Mountain Lion's Messages

I just noticed that I am unable to send or receive iMessages on the Messages app on OS X Mountain Lion.
I checked the accounts, and the only two active are my facebook chat (which I regularly use) and Google talk. I do not see an iMessage account. When I try to add an account, the types are Yahoo, Jabber, AIM, and Google Talk. It doesn't seem any of these fits.
I am signed in to my Apple ID on my Mac and iCloud has everything enabled. What is the issue?

Hi Plasma,
It sounds like you may be looking at the Mail, Contacts & Calendars option under System Preferences. You need to set the iMessage account information up in the Messages app. Open the app, then select Preferences from there:
Cheers,
GB

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backup the device with itunes.
Restore the device with itunes and set up as new.
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We're sorry.
We can't find the article you're looking for.
Please return to the Apple Support homepage.
Sigh.

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Hello,
I have 13" MacBook Pro 2.4 that came with Snow Leopard. I have found that it does not perform really well with Mountain Lion (although 8GB RAM and 7200rpm HD) so I decided to switch back to SL. I also own Parallels and it lets me use the ML download image to set up a new virtual os, which I can then use to run iBooks Author.
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Edited (fixed screenshots)

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