Hello i recently bought a anycubic kossel linear plus from amazon. I’ve never built a 3d printer before so I followed the instruction manual and closely as possible. I am now at the part with downloading drivers, software and firmware however with pronterface when I click connect it says “Connecting…” on the right but it doesn’t actually connect. Can anybody please help

I’m okay now I found out what I did wrong. I did not close arduino correctly