Sequencer crashes every time

Hi all,
First of all, please feel free to move this post if I am not in the right section.
I am not able to render any sequence at any resolution, even at 320x240…but I can take hight resolutions screenshots, it is that normal? I have an i7, 32Gb Ram, and a Quadro m4000, I know its not a very powerful machine but I hope this is not the problem, If I can take screenshots I do not understand why I cannot render the sequence… I have migrated the scene to a clean new project and increased the tdrDelay of the graphic card, but still not working. I am always getting this error: “out of video memory trying to allocate a rendering resource. Make sure your video card has the minimum required memory, try lowering the resolution and/or closing other applications that are running. Exiting…”
Do you have any idea?