@Laszlo-Somogyi In case you use the Beatbox virtual instrument there is a small icon to drag and drop the resulting audio file to a track. Alternatively, export your project with your solo'ed track as a WAV file and then drag it back into the project.

In case you click on the graphical image in a Vita drum instrument and want to record the performance click the red REC button in the track header until it reads MIDI REC and then you can record notes with the global internal virtual keyboard. Clicking on the drum parts will only give you a sound test.