barenose may find the Java is being served old,
Have you also cleared the Java Caches? Some Computers can't distinguish between versions of the Admin Console and will attempt to open the 'old' console when it should be downloading a new one. Only by deleting the Java cache can you force it to do what it should.
Open "Java Preferences"
Lower left corner the button "Delete Files".
You may also want to delete the Security settings for the FMS sites under the Security tab.