Mac not recognizing Time Machine after Mavericks Clean Install

Hello,
I just did a clean install of OSX Mavericks and I can't access any of my Time Machine backups and am very worried about having lost all my data.
Before I did the clean install, I backed up data using my Toshiba 1TB External hard drive using Time Machine. It backed up successfully and has been doing so for about a year.
After the successful clean install of Mavericks, I plugged my external hard drive in, to which I was prompted with "would you like to use this hard drive for Time Machine Backups?" I clicked yes, and it said "Decrypting Time Machine Backups." I got worried and quickly cancelled the decryption process.
Now, whenever I plug in the external hard drive, nothing comes up. I can't access any of its files. Whenever I open the Disk Utility application, it does recognize that its plugged in, but its grayed out, and I can't do anything with the drive.
I'm very worried about losing all my data and info and would greatly appreciate any insight about this.
Thanks
MacBook Pro
15inch Late 2011
OSX 10.9.1

Solved. Right click on the hard drive in Disk Utility, click "unlock."
So simple, yet so obscure.

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