Error 507 indicates you do not have an OS currently on your device. You will need to install one. Here is the latest one available for your device : http://www.blackberryforums.com/gene...ilanguage.html
Unfortunately if you don't have a backup, you've lost all your data.
Follow the install instructions in the link I provided and you should be okay. You may see the spinning hour glass for more than 15 minutes, don't disconnect it, just be patient.
Welcome to the forums and best of luck