Strange problem : Audio treatments do not work

Thanks for asking.

Once a project is created, Cubase opens. I’m starting from scratch so no conversion is applicable.
Highlight any audio track.
File>Import> Audio file> then the Windows audio file box opens so I can select any audio file.
select the file, open it, then the wave part appears in cubase.
Highlight that part, select the audio tab>process> gain

The gain box opens up, lets say I want to reduce the gain, so i use the slider to reduce it, hit process…and the wave image in my project window doesn’t change and of course neither does the actual audio.

This is applicable with most other functions such as normalize, fade in/out etc. The only function I found that works is silence.

Hope that helps.