Hi my name is Davide Negro and I have recently purchased the CRJ-200. I have problem: I am not able to manipulate different switches of this aircraft. For instance I am not able to set Battery Master on and other switches by dragging them. Some switches work others not. What do you think it is due to? These are my PC specification: Macbook pro 13 "Processore Intel Core 2 Duo 4GB di Memoria Disco rigido da 320GB1 SD card slot Processore grafico NVIDIA GeForce 320M. 256MB. Thanx so much for your kind help Davide