Welcome to the forum
Don't worry about your English, as long as you guys keep
producing decent cars!
I am not clear whether or not you did uninstall X5.
Uninstalling is necessary as you only bought the upgrade. The
procedure should have been to put in the TCS number during the
install and later in the procedure you get asked for the old
version number. The serial number should start RH.
Post back if still in trouble.
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