Vegas Pro 11 64bit

all,

i am having some trouble.

I have had no issues with vegas rendering before. i get the very frequent crash, but to be honest I have got use to those. I have not had issue with the rendering of files before.

I have a i7 950, 8gb RAM and 1.2tb hdds with an nVidia 260gtx. drives and everything like that are up to date, as is vegas.

I am rendering mt2s files from a TD10. the files are 3d but i am only using the left eye for preview, project and render settings. there is very little transition apart from a standard cross fade.
i have rendered from the file before (it was only about 3 mins long at the time), however, i am now getting random crashing (no known error, no actual crash in vegas). the video is now about 25 mins long.
the video preview freezes, the file its rendering to isn't increasing in size - its just dead. cpu drops to zero, ram is doing nothing.
it freeze at a frame 461 sometimes and other times at a frame in the first two thousand.

i have turned off GPU and it hasn't helped.

i am right now attempting to render to a second disk and render in widescreen DV PAL to see if that completes - preview RAM size is now down to 256mb; plus the GPU is still off.

anyone else had such issues before and how have you resolved them? its a complete pain in the ar53.