Upload to multiple servers using privatekey

Hey guys...

I'm trying to connect to multiple servers and uploads some files. My problem is that I have to enter the password every time it connects to another server...

I'm using;

open user@ipaddresse -privatekey=C:\somekey.ppk
and later when the files is uploaded
call find /somefolder/* -group admin -exec chgrp www-data {} \;
close

and then the next server...

Now every time I do a open and that other line that changes group... I have to enter password... Any way to store that password in a session or something like that?

Please read documentation:
https://winscp.net/eng/docs/ui_pageant