Color / luminance correct set up
 

I`ve been a Vegas Pro user since version 3.0, but as the last versions have showed many issues, mainly when using Cineform Neo, I`m trying Premiere Pro 5.5

One of the things I first observed was that the preview image window showed a much more contrasted image (probably with a higher black level or gama level) than the preview window of Vegas Pro 9 / 11 I was used to. Then I made a test rendering the same one minute of h.264 stuff to QT uncompressed, in both Premiere and Vegas.

When I watched the rendered clips in Vegas Pro 11 preview window, the Premiere clip was much more contrasted (higher black level?) than the Vegas Pro 11 clip, which seemed to be correct.

The fact is that both clips are very diferent (regarding contrast / black level) played by the same player (Vegas Pro preview window) and (obviouslly) seen at the same monitor!
What explain this fact, except for some missing set up?
So, is there any previous set up that should be done in Premiere Pro 5.5 to work with the correct luminance, gama or chrominance signals (if that is the problem)?

Thanks