99 S80 T6 won't crank and shifter light and dash info says stuck in "D"
 

I just bought a 99 S80 T6 and it won't crank over. I believe it's because of the shifter saying the transmission is in drive. I can move the shifter through the gears like normal but the light and the dash will always say "D" no matter what position the gear shifter is in.. anybody have any ideas as to why this is happening and how to fix the problem? Thanks in advance...