the fps usually is governed by the video standard - the setting for NTSC (29 or 30 fps) or PAL (24 or 25 fps) see
here for short explanation or google further for long explanation.
When you installed Nero you had the option to say where you live so that it would default the standard to the correct one for your area - there is an option to change it somwhere - just don't have nero on this machine atm so will get back to you if you can't find it