Trouble Rendering Audio Edits

[bigapple]

I'm using Sony Vegas Pro 8. I recently reinstalled it to my new computer. I was editing some audio clips which I then rendered as mp3's. But when I go to play back the rendered clips they only show up as tiny blips (about 2 seconds). What happened to the rest of the audio? How and why did this happen? Thanks again for your help.
Dave

[TimStannard]

You have made a selection on the timeline and are rendering with "Render loop region only" switched on.