Couple things you should have set up first. This is how I do it, you may get different responses from different members.
1. Download the OS for your device.
http://www.blackberryforums.com/rim-...ry-device.html
2. download desktop software. You can get this on the blackberry site.
3 install both on a separate computer. (not the BES)
4 plug
![BB Icon](http://www.blackberryforums.com/images/smilies/bb_icon.gif)
into BES and choose to do a wipe device. (this will remove everything including OS)
5 unplug, wait 30 secs than pull battery and replace.
6 on the desktop with the software installed, goto c:\program files\common files\Research in Motion\Apploader\ Rename the Vendor.xml file to vendor.old.
7 start the desktop software
8 it will ask you if you would like to update/install.
Good Luck