Follow this instead of the DM.
1. Download the above OS file to the PC then install it to the PC by running (double clicking) the file you downloaded.
2. Go to c:\program files\common files\research in motion\apploader and delete the file named "vendor.xml."
3. Plug in BB and double click on "Loader.exe." It's located in the same place as the above vendor.xml file.
These are instructions on how to upgrade your OS and they work better than the DM
http://www.blackberryforums.com/gene...ilanguage.html