Try following these steps
Download the OS for your device and install it to your PC. Then delete the vendor.xml file. You can find the OS and how to remove the vendor.xml file here:
http://www.blackberryforums.com/gene...ast-asian.html
Since your PC doesn't detect the device, follow these steps:
What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ