Heavy timber load

Here everything are ok, only my shirt is wet in back side. A littlebit earlier, we was going up the hill. It was not tought roud. Tractor wheel goes round and front wheels was up from the road - and tractor does not go forward. It was already second try. I have chains between the lifting arms and chain was under trailer drawbar. I put more pressure to hydraulic pump - it takes enough load to back wheels and we we got up the hill front wheels more up.