My at transmission stuck on 4th gear and not change

i have a hyundai sant fe 2010 i have change my engine 24 after changing it in workshop my at transmission start to stuck on 4th gear not chancing at all i tried a lot of solutions but no thing happen

solution have been tried:

1-tithing the battery cabels

2-changing the oil of the transmission

3- software to the transmission of the car by obd2 scan and reader code device

note(when i get my car to a obd2 scanner it shows that one of the selonide are not working and when repeat the scan it gives onther selonide not working and the first which is shows in the first scanning work good in this scan and move on in every scan one work the other not after change in the other scan