Complete novice can't hear his VST

I’ll start by saying I am a total newbie so please be gentle. I am running Cubase 5 with a Lexicon Alpha external soundcard and Oxygen 25 controller. I can’t hear anything I play though the controller though I CAN see an input when I hit keys. A helpful Cubase guy on you tube looked at these screenshots and said connections wise things look good. He said to try an Instrument track not a MIDI track. No joy, but also now no signal at all when I hit keys.

This has had me tearing my hair out. I am kneeling and begging for help please. The screenshots attached are how I have set up the busses, ports and VST Audio system.

Thank you!

Take a look at this post:

If this doesn’t work, maybe try the trial version of Cubase Elements 9.5 and see if you can get it to work there. Cubase LE 5 is VERY old and running it on newer versions of Windows isn’t officially supported.