If you didn’t give the marker a name it should way something like marker # when the playhead is paused directly over it. Use Shift- up and down arrows to go to the next or previous marker to make sure you’re exactly on the marker. Also make sure the marker is applied to the timeline ruler not to the clip. Clip markers don’t appear in the canvas only in the viewer.
All the best,
Tom
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 2 Editing Workshop” Class on Demand “Complete Training for FCP5” DVD