GanyMed-SSH2 & Script SFTP

Hello
There is my situation.

I want to get connected to a Server Ubuntu (let's call it Server 1) and run a script which contains sftp commands that transfers a file to a second Server (server 2).

When I am on Server 1 I can run the script and the transfer is done, but when I am using my java application with Ganymed-SSH2 to get connected to Server 1 and run the script I get Commande exitStatus 255.

When I use putty to get connected to Server 1 and run the script, I'm asked to give the passphrase even if I copied the passphrase in "authorized_keys" of Server 2.

There is the script I run:

Code:

---

#!/bin/sh
#!/usr/
sftp login@server <<EOF
put file
quit
EOF

---

And this is the java code I'm using:

Code:

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Connection connection=new Connection("SERVEUR");
                try {
                        connection.connect();
                        connection.authenticateWithPassword("login", "password");
 
                        System.out.println("Connection Established");
 
                } catch (IOException e) {
                        // TODO Auto-generated catch block
                        System.out.println("Connection Failed");
                        e.printStackTrace();
                }
                Session session=connection.openSession();
                session.execCommand("./script");
 
        System.out.println( "ExitCode: " + session.getExitStatus() );
 
 
        session.close();

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Hope someone can help me.