Hello, my girlfriend just got a 2003 Convertible New Beetle. The soft top works wonderfully, it unlatches and starts to go down, but then when it gets most of the way down, it makes a jamming sound and stops moving. After driving a little bit like that, the warning light for it goes on. One of the back windows does not function properly all the time, is this the problem? If not, how can I fix this?