thanks both for your advice so far. Latest update- my midi /usb lead was showing its lit up power button as soon as it was plugged into the turned on laptop, and as soon as i switched on my midi keyboard synth, the midi in light would come on and flicker very fast continuously even before i started playing. When it was like this it would work. then the midi in light on the lead went off, and everything worked as normal for maybe 30 seconds. During this time, midi in light only lit when I played a note. Then it went back to the continuous flicker' Decided to try another midi keyboard. With this keyboard the midi in light on the lead only lights when I play a note, but it still won't trigger a sound on the cakewalk vst. I keep going back to preferences, and my midi usb lead is selected as an input and I am arming my vst track and input echo is on. So not sure what to try really. Or maybe the god of music is trying to tell me something!