Sony Vegas Pro 13 Taking Too Long to Load Frames When I Play Another Part of the Video

[LegacyBow]

Whenever I jump around clips in sony vegas pro 13, it says it is not responding. This happens every single time, even if i go a couple frames back. Also, when I add a new video to Sony Vegas (actually even the first video) the screen of the recording goes black while it tries to figure which frame it's going to, this happens when it goes from video 1 to video 2. Can anyone please help me with this?

 

[LegacyBow]

I figured out the not responding part but it still takes too long to load parts of the videos