Thanks for your reply, I have desoldered my tsop and read the firmware with a willem.
After this step i have used firmware toolbox 31br, decrypt, smart patch, encrypt, resolder the tsop.
The key is located at 4E10.
I think there is a problem with toolbox, i have tried with toolbox 3.0, 3.1,3.1b,3.1br
The output file with 3.1,3.1b,3.1br is the same.
Have you an idea about this problem ?