Left shift key not seen

Can’t seem to get Renoise to see my left shift key when used with the numpad (so Shift+numpad 1 for exampel). It’s fine for normal windows stuff (like MAKING CAPS here) - but Renoise does not seem to respond to it). Any ideas? It works on another machine but not this one … Must be missing something obvious … Any ideas?

Theres something weird about it being the ‘end’ key - but it works just fine on my other work machine. Go figure.