Problems editing.

I am trying to help one of our users edit a wiki on our site. They are able to log-in after they click on 'edit page' but then it goes to a screen with a script. They tried changing their setting to the point and click browser, but now when they click on the edit page button, they get a blank edit page... nothing on it except cancel and Save buttons that give an error message when selected. Pls. help!!!