Just a reminder to be courteous and try to respond to a member's request within 48 hours, even if it is to let them know you are unable to help them out at this time. And another tip, you are more likely to be contacted for an exchange if you add a service description.
1. Type about:config into the location bar and press enter
2. Accept the warning message that appears, you will be taken to a list of preferences
3. Locate the preference browser.cache.check_doc_frequency, double-click on it and change its value to 1
Tools > Internet Options > Security > 'Internet' same page Custom Level > And then scroll down the settings list, under 'Miscellaneous' check Enable for "Display mixed content" > Click Yes > Apply > Ok > Restart IE.