Hi, Finally got the collectors edition running perfect on vista,Speed etc... all fine I've set a base up and I can do the missions of ufos that are already grounded but if I try attacking them using my interceptors it goes to zoom in but it seems to get half way and zooms back out and the interceptor keeps tailing it till it looses it or tries engaging and the same happens again. I've checked the weapons and I have them on, I don't know what to do any suggestions?