Mark, Try this:
1. Click the Tools menu in your web browser (if it is Internet Explorer) and choose Internet Options. If it is Firefox or some other web browser then go to your Options.
2. In the Options box, click Delete (or Delete files). Whatever the options is called to delete your Temporary Internet Files (cache).
3. Click OK to delete. If there is a little checkbox that says "Delete all offline content" check that and click OK.
4. Click OK to exit the Internet Options box.
5. Go to the Whitney Portal Store home page and click the Refresh button. Or, as an option, close the web browser, reopen and try the web site again.