[jimmyh]

Remember there are 2 vendor.xml files, you need to unhide the files on the folder option.
Open my Computer
Click organize on the upper left window then click on "folder and seach" option
Then go to the "view" tab and click "show hidden files, folders and drives". It may just say hidden files-click on that square.
Then go back to C:\Users\user_name(mine is jimmy yours will be YOU)\appdata\roaming\Research in Motion\Blackberry\loader.xml.
Here you will see another vendor.xml file--delete and you are ready to go.
The above instructions were used on Vista, XP reads a little different and I'm not sure about Windows 7. I have 3 computers and all are different I just happened to use these instructions on Vista. Hope this helps, it surely helped me....