a little lost

hello everyone , we now have 2 people in our group because sabrina has left . we are struggling but we did not quit. Robert has completed the bot on solidworks and just needs to add an arm to it. Besides that we are a little lost with our robot , we have no idea why it is not moving. we built it perfectly fine. we keep changing the batteries but it is still not woking and we are losing time. we still did not complete the tetrahedron challenge. we need to step up even though we're only 2 people. I hope we can continue and find the problem as fast as possible.