Ok first off I have a 97 jetta with an auto tran. When I start the car it will idle perfectly fine but when i put it into gear (reverse or drive) it will shake violently and stall out. Once the car is driving though it is fine. But when you come to a stop it will happen again. I noticed it when I came to a stop light the other day. But after the car is warm it will no longer have any problems what so ever. The vacuum hoses are fine by the way. O and when I say it shakes and stalls out it shakes like crazy and stalls like 5 seconds after, it actually scares me into thinking my engines going to fall out. But again it only happens while idleing in gear.
Any help would be very appreciated.

Additional Details
Somebody suggested the engine mounts to me but the problem went from 0 to 100 in 1 day. Also even though it's a 97 it's only got 120k on it.