If your ankles are that sore after a run, you should avoid running on uneven surfaces until you have some more strength and better proprioception as suggested above.

Meanwhile doing the one legged standing balance exercise described can help. Then you progress to a less stable surface like standing on one leg on a pillow or air mattress and doing the alphabet with the other foot, or tossing a ball against the wall. When you go back to running on grass or uneven surfaces do short intervals first to see how you tolerate it, like 30 sec. It would be good to go to a track where it's safe to run/walk barefoot, do a lap on the track then a running/jogging interval for 30 sec and go back to the track. You should start with short runs like this... maybe 20 min in total.

http://www.youtube.com/watch?v=8QOp6...e=channel_page

This is a link to a proprioceptive exercise video, these folks put a whole bunch of them on youtube starting from basic to harder and harder.

Hope that helps.