transmission issue
 

I have an 02 9-3 turbo and the car was running fine until two days ago. while driving the transmission disengages and wont re-engage. I have to shut the car off wait a few minutes and then start her up again and the transmission starts to work again. After a few minutes of driving, it does the same thing over again. I have to keep shutting her off and on so that I can move the car. Can anyone help with some insight to this issue? Any input would be deeply appreciated.