Q.  My image is appearing in edit mode, but not on the published page.

Underneath your editor, click the link to 'Input Format.'  By default, all editors are set to 'Filtered HTML.' This is to prevent anonymous users from posting HTML when comments are enabled.  Since you are an administrator, you can work with full HTML, or 'Rich Text Editing.'  Once this setting has been changed, your image will appear on the published page.