[Moodle] Missing grade book page

[Laurie Savage]

I've got a puzzling problem with one class. When I click the "grades" 
link on one of my classes I am presented with an empty page. The tabs 
are there but none of them have any content. In the settings page I have 
selected "Show Grades". I have about five tasks with marks awarded for each.

Other classes do not have this problem.

-- 
Laurie "if I'm a guru why can't I fix this" Savage
Pascoe Vale Girls College