He is still lame after being kicked so no work

. His manners have gone compleatly after just over 2 weeks in his stable. He has equine touch just over a week ago and bit my arm while I was holding his lead rope. Walked him around the school on sat he kept nipping me and shaking his head at me but settled down after a few mins. Tonight I though he might like another walk round the school after his groom (he was an good lad while being brushed) I put out a few poles and a traffic cone to make the walk more interesting - he kept nipping me and shaking his head at me. I tried making him back away he would be good for a few steps then nip at me again
I dont quite know what to do ... any one got any ideas?