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9300 with 6.0 from AT&T
BlackBerry Desktop 6.1 on Windows 7 64-bit
downloaded 188.8.131.522 and installed on PC. Deleted vendor.xml
Run loader.exe /nojvm
"The BlackBerry Desktop Software does not have BlackBerry Device Software for the device that you have connected to the computer. Contact your wireless service provider or system adminstrator".
I tried to upgrade to Desktop 7.0 but it says it can't be validated.
How can I fix it?