I have done everything as sugested:
* Download the latest USB drivers
* Install the Tetherberry App on the PC
* Download the BB App
* Start the PC app
* Connect the usb cable
* Start the BB App
However I still can't establish a connection.
When everyting is connected and start the app on the BB, nothing happens. Just a blank screen with the tetherberry logo.
Can somebody help me please?
I have a 4.5 Curve 8300 and a Latitude D610 with XP sp2



Which carrier are you with? Do they need APN settings?
Also which version is your BlackBerry OS? 4.5.0.x?