Questions.
1) How long was your system open to the air?
2) Did you replace your reciever/dryer?
3) Did you evacuate the system before you filled it?
4) Why did you think 36oz of r134a would be a good idea in a system designed for r12?
My theory based on your comments so far.
1) You have water in your system.
2) You have either too much, or two little freon.
3) You have the wrong type of freon.
4) Your screwed.
I suggest the following.
1) Turn off your AC.
2) Go to a shop that services AC.
3) Tell them what you did. (Try not to notice the laughter at your expense.)
4) Ask them to replace your reciever/dryer and evac and recharge the system with R12. (They will have to flush the system out most likely to remove the wrong oil/freon you put in there.)
5) Pray that your compressor is not going to die an early death, and then enjoy your now working great AC in the summer heat. (And it makes your defroster work so much better in the winter time too.)
Good luck.