Can't shift into any gears on 1991 Mitsubishi 3000GT SL

I have a 1991 mitsubishi 3000gt andWhen off, the car shift to all gears fine. When turned on, I cant shift into any gears at all. It feels as if the car has it locked. Someone help please!!

Asked by for the 1991 Mitsubishi 3000GT SL
You may have had a failure in the clutch hydraulic system- check the fluid- if it is low you have a leak!! Greg
1 more answer
You don't specify if automatic or manual transmission. In eather case, have you checked to make sure the transmission fluid is at the proper level