SeasonPass Tether Boot doesn't light up

For some reason when I start SeasOnPass the tether boot button doewsn’t light up.  It keeps telling me to turn off my antivirus which is off already.  Then I restart the seasonpass and it still tells me the same when my antivirus is completely turned off.  Could someone help me with this.  I get this on both laptops one has Vista and the other has Win7 as OS.  CAN ANYONE HELP ME WITH THIS PROBLEM