Car won't up shift or down shift at hot temperature

Just bought a automatic Honda civic 96 a few weeks ago,and its making me a headache.the car's shifting normally at cold to hot temperature it shifts perfectly no drug,no harsh shifting,no slippage evrything is fine.but when you turn off the engine at hot temperature to have some coffe or make some gas or anything and then re start the car and go for a drive again this is when the problem comes out the car won't up shift or down shift, nothing no kick down it is likely stock at 2nd gear.i check the shift solenoid it is working,I changed my ATF oil,I used the Honda genuine ATF oil DW1.but nothing happens. What could be the problem on this?lol need help,thanks