Cubase VST 5.1 midi import problem

Hello Forum,
when I import some midi files into my (old) cubase vst 5.1, the file name changes into the name of the track where I’ve drag and droped it to: e.g. the midi file was orig. called “pad C minor”, after importing the file, the file name had been changed to Track 7 VST.
Any solution how to change this? PS.: I’ts not happening to all files. Some file names remain named as originally.
Tks for any support
Lars from germany