excuse me because I didn't fill the data completely ...
the version of elasticsearch is 5.0.0-alpha4 and the error that I mentioned to was exact error that I got
and I'm sure that I have set the PATH value correctly
but now another error is appearing ...
Error occurred during initialization of VM
Could not reserve enough space for 2097152KB object heap
I have tried this link but it didn't worked for me ....
My machine configuration :
wndows 8.1 64bit
4 GB ram