Often when you visit a website and your browser, in this case Internet Explorer, is not set to check for new versions of stored pages you are not seeing the latest content of the website or page, as your computer is reading the information from the cache, not the website.
Here is how to make sure you always see the latest version of updated web pages:
Microsoft Internet Explorer 6
Step 1: Click on Tools
Step 2: Click Internet Options
Step 3: Click Settings button
Step 4: Verify that Automatically is selected
Step 5: Click the OK button and then OK again
Microsoft Internet Explorer 7
Step 1: Click on Tools
Step 2: Click Internet Options
Step 3: Under Browsing History section, Click Settings button
Step 4: Verify that Automatically is selected
Step 5: Click the OK button and then OK again
Netscape
Select Edit, then Preferences
Click the + sign next to Advanced to see more options
Select Cache
Select the Every Time radio button at the bottom
Click OK
Restart all open web browsers
FireFox
Edit -> Preferences -> Advanced -> Cache ->
Select - Every time I view the page