Only the Administrator can export your school settings to ReportServer. If you are not the Administrator then you can export to file or memory stick instead.
Click 'Admin', then 'Upload Settings', a dialog will appear listing the names of the files that will be uploaded, click 'Yes' to start the upload.
If there is a problem connecting to ReportServer then try using the ReportServer wizard or manually change the 'Protocol' in the ReportServer options. Alternatively, use a different method of exporting your settings.