This error might occur after installing an Interim Fix or Fix Pack. The browser cache must be cleared. Clear the browser cache using examples below.
Clearing Cache on Windows Internet Explorer Web Browser:
In IE 7.0 click on Tools button
to see this dropdown menu.
Now click on Internet Options
on the bottom of the menu. Screenshot #2
 In IE 7.0 you will get this dialog box
when you click on Internet Options
shown in Screenshot #1. Screenshot #3
 In IE 7.0 you will get this dialog box when
you click Delete under Browsing history as
shown in Screenshot #2. To clear browser cache,
click Delete files under Temporary Internet Files
as shown in Screenshot #3. Screenshot #4
 In IE 7.0 you will get this Delete Files confirmation box.
Just click on Yes to clear browser cache
as shown in Screenshot #4.
Clearing Cache on Mozilla Firefox 3.x Web Browser: 1. Click Tools and select Options on the Mozilla Firefox menu bar.
2. Click the Privacy Icon on the Option menu bar to open the Privacy Properties.
3. Click the Settings button in the Private Data section (see above) 4. This will open the Clear Private Data window (see below)
5. In the Clear Private Data window, make certain that Cache is checkmarked. You may checkmark other options as well, if you wish. 6. Click Ok to save settings. 7. Exit and relaunch the browser. | 
