When i reneder a video with sony vegas it renders it but only 43 seconds of it.. the thing last 7mins?

what should i do do you guys have any help?When i reneder a video with sony vegas it renders it but only 43 seconds of it.. the thing last 7mins?
zoom out as much as possible so that you could see the whole project in one page(use zoom tool). press Home button and then hold shift button and select the end of your project. now you can see the highlight area is getting bigger and now you can render your project again. this ability is made to let the users render only a small part of their project instead of rendering the whole project every time they want preview a part of it.When i reneder a video with sony vegas it renders it but only 43 seconds of it.. the thing last 7mins?
you can highlight what section of the video you want to render. most likely you have only selected part of the video to render. go to 43 seconds and you'll see where the loop ends. you need to drag the loop region over the entire length of the video you want to render.