Are you sure that's your firmware? That's the Kindle Firmware for a K4. The Kindle 3 also know as the Kindle Keyboard has a physical keyboard and uses 3x firmware.
Have you tried rebooting the Kindle. If that doesn't work a Factory reset may be needed. Make sure Airplane Mode is Off.
Edit: You have a K4 not K3. I can tell from the pic now I looked closely.
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