Or you can ask your teacher, who can probably spot the problem and tell you the fix in a matter of minutes at most.
What does your teacher suggest?
my teacher speak: repeat, repeat, until works (aikikai super traditional)
the failure does not necessarily occur with the strongest. The problem: not all resists the same way. some leave movement occurs without resistance.
when there is resistance, I can not keep the body of the uke in the same vein of the arm.
example: if I make ikyo in the the right arm of the uke -> my right hand low his fist, but my left hand can not low the rest of the arm.
if I put my left hand nearest the shoulder, the pressure on him will be stronger?
advised me to stay as close to the body of the uke?
correct mode e my wrong mode (final position):