Passwordless acess

My client doesn't allow normal FTP anymore and will only allow SFTP without password I am passing the following command script files but it doesn't seem to work still asks me for password

options batch abort
option confirm off
open prcdsafe@10.217.xx.xx -hostkey="ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1yM/SKgnB8RZUUg4QorK4FqHq0kmySQUVMXJoOFbDWLUMWX3SUdeg7aAY+VhRDZxDl9hyAN6/9NXpPwXjGVcbljgBoXYTJm1f1H3EO77XkCBSm7WJuwXxWwEpnaKf48R42oIv0VJi5z9cOPDLdyPf4xMIoeo4w== datasafe@flplanoptcm4"
lcd C:\DOCUME~1\DATASA~1.000\LOCALS~1\Temp\4\
CD ../..
CD /var/opt/ericsson/nms_umts_wran_bcg/files/import
put C:\DOCUME~1\DATASA~1.000\LOCALS~1\Temp\4\2011-10-06_11192508_BLRNC1_DATASAFE.BLRNC1
close
exit

----------------------------------------------------------------------

C:\Documents and Settings\datasafe>winscp.com -script="C:\tmp\FTPScript.txt"
Unknown command 'options'.
confirm off
Searching for host...
Connecting to host...
Authenticating...
Using username "prcdsafe".
Using keyboard-interactive authentication.
Password:
Access denied.

Authentication log (see session log for details):
Using username "prcdsafe".
Access denied.
Access denied.
Access denied.
Access denied.

Authentication failed.

C:\Documents and Settings\datasafe>winscp.com stp -script="C:\tmp\FTPScript.txt
"
Searching for host...
Network error: Connection refused.
Unknown command 'options'.
confirm off
Searching for host...
Connecting to host...
Authenticating...
Using username "prcdsafe".
Using keyboard-interactive authentication.
Password:
Connection has been unexpectedly closed. Server sent command exit status 0.
Authentication log (see session log for details):
Using username "prcdsafe".

Authentication failed.

C:\Documents and Settings\datasafe>winscp.com stp//:prcdsafe@10.217.196.80 /script="C:\tmp\FTPScript.txt"
Searching for host...
Network error: Connection refused.
Unknown command 'options'.
confirm off
Searching for host...
Connecting to host...
Authenticating...
Using username "prcdsafe".
Using keyboard-interactive authentication.
Password:

So there's no authentication on that SSH server needed?
How do you login say with SSH terminal (like PuTTY)? Can you post a log from one?

thanks Martin....

we are using cygwin at the moment at client site and hostkey exchange has been done between the two servers when i login via cygwin I get the folllowing log on login

datasafe@flplanoptcm6 /cygdrive/d/HistoryBackup/printsdump/20111004T0658 [0]
$ sftp prcdsafe@10.217.196.80
Connecting to 10.217.196.80...
sftp> pwd
Remote working directory: /home/prc/prcdsafe
sftp>

Please post a full WinSCP log file showing the problem.