Vegas 10 - clips not playing

[A maid]

So I just finished this video *look at banner* and while I was editing one clip wouldn't show anymore so I re-edited that part and thought it wouldn't
happen anymore. So later when I finished it it happened again but also on 2 other clips and I have no idea on how to fix this (yes I looked on Google too but couldn't find
anything as usual). Please no useless answers because I need this fixed quickly.

[Cookie]

Restart Vegas then render

[Determined]

Yep, rring fixes that, I have the same bloody problem.

[A maid]

Thanks guys, I'm trying to render a little test clip to see if it really will work.

edit: it's rendering really slow compared to Vegas 8, was the same with the previous render. Is this something usual in 10 or...?

[MxZz.]

Just don't use vegas 10

[__JREN]

when you suck vegas doesn't work 

[A maid]

when you suck vegas doesn't work 

Lucky for me I don't suck - I win. But I wonder about you..

Just don't use vegas 10

Now I remember something in the back of my head saying something about useless answers..

Ah!

Please no useless answers because I need this fixed quickly.