Problem in connecting host address?

I am trying to connecting the hostaddress using sftpclient provided by Renci.SSH.NET.
Reading host address, UserName,Password from XML file and make use of this host address to connect to host but error: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 192.168.1.##:22.
ps : also error during checkauthorization object reference not set to an instance of object.

My XML FIle:
<?xml version="1.0" encoding="utf-8"?> <Configuration>   <HostAddress>192.168.1.86</HostAddress>   <UserName>root</UserName>   <Password>root@123</Password>   <SrcPath>/var/lib/asterisk/sounds/recordings/</SrcPath>   <DstPath> ...