Sony Vegas 11.0 cant render?

[What_will_happen]

Hi,

When i render in Sony Vegas 11, im using (Internet HD 1080p)

The finished video is very very laggy, is ther anyone how knows why this happen?

 

[What_will_happen]

Hi,

When i render in Sony Vegas 11 the finished video is very very laggy, im using (Internet HD 1080p) i have tried different settings but same problem everytime..

Is there anyone how knows why this happen?