I tried to login broker server with ssh key (privateKey.ppk),  before  I converted "id_rsa" private key  with Putty Style such as .ppk  using puttyGen

I am able to login with Putty and    winscp using the privateKey.ppk .  

But when I login with x2go client using below url it is asking  "Enter passphrase to decrypt a key"

I copied the privateKey.ppk into  " C:\Program Files (x86)\x2goclient"  directory and pageant.exe already exist there.

C:\Program Files (x86)\x2goclient\x2goclient.exe"  --broker-url=ssh://jyoti@192.168.0.19:/usr/bin/x2gobroker --broker-key=privateKey.ppk