Grand Marquis Starts In Neutral Only?

I hope someone can me some insight. I have a 91 grand marquis and it has been running great up until today. While driving home from work I noticed the car was running funny so when I got to the light I put it in neutral because it seemed like it wanted to die out. The upon going again it still seemed like it wasn't running right. When I got home I shut it off and now it will only start when in neutral and after it's running in neutral once I put it in reverse or park it automatically just dies out? Transmission is still running fine. any ideas?

for the only starting in neutural problem its probly the neutrul safty switch in the trans

When you say, "running funny", what exactly do you mean?

-edit- Also, I agree with CobraDude, the safety switch for Park may have gone. But more info is needed....

for the only starting in neutural problem its probly the neutrul safty switch in the trans
Well just got it back from the shop! We had to have the whole transmission rebuilt because the gears were all bad.