Hi Harry. As the above did not fix the problem, please try changing your 'Temporary Internet Files' settings to 'Automatically'.
Instructions for Internet Explorer -
1. At the top of your browser, click 'Tools' then 'Internet Options'.
2. Make sure you are on the 'General' tab of the 'Internet Options' box that opens up.
3. Click the 'Settings..' button (located in the 'Temporary Internet Files' section or 'Browsing history' section, depending on browser version)
4. You should now see in the new box that pops up 'Check for newer versions of stored pages:' followed by several options such as 'Every time i visit the webpage', 'Every time i start Internet Explorer', 'Automatically' and 'Never'.
5. If you see the option 'Never' is selected, this can cause the problem you're experiencing. Please change it by selecting 'Automatically' or one of the other options instead.