Hi nesrine mhiri,
please, check if you see it in your Computer.

If yes, look into the storage. There is info.htm and you see in the file information about versions.
It looks that you have not installed PEMicro OpenSDA Debug Driver.
You may to install new software from PEmicro sites. Please, look here
OpenSDA on the Freedom KL25Z Board | MCU on Eclipse
I hope it helps,
Iva