Camera moving over a track skipping points

Hi I’m trying to make a camera follow a certain path (a roller coaster to be exact). I imported a mesh file with a continuous line and converted it to a path ( a NURBS curve if im correct). Next I selected the camera and the path pressed CTRL-P -> follow path. When pressing ALT A the camera does indeed follow the path like I want to but it goes way too fast. The path excist of about 18000 vectors but the camera uses just 100 of them. So the camera jumps from the start to halfway the hill up to the top etc. Is there a way to make the camera follow all the points? Or can a camera path only contain 100 points?