Recently upgraded my MacBook Pro to SL 6.2. Then my Epson desktop printer wouldn't work. Downloaded a SL upgrade from Epson website. When I click on the "Install" icon, am prompted to type in User Name and Password. Type in User name but when I try to tab to the Password box the cursor disappears. I then get a message that says "The software to be installed requires Administrator or higher access privileges." My Accounts pref says that I AM the administrator. What gives?