Unable to change film's quality while exporting a movie on "iMovie 9.0.9".

When i'm exporting the project on iMovie, I'm NOT able to choose the quality of the film, it only allows me to pick the lower one (480 x 272). I've tried to export the project with quick time player, but it doesn't work neither.

I'm having iMovie 11' version 9.0.9 on a OS X Mountain Lion's 10.8.5 version.

Any suggestions? I add an screen capture showing you the issue. I know it's in spanish, but I guess that it's the same format.

As you can see, it only allows me to choose the "Móvil" option (which is the smartphone or iphone option I guess..)

Thanks for your attention!