无法使用Net :: SSH：Perl登录

我刚刚开始使用Net :: SSH :: Perl，看来我遇到了一些奇怪的事情。如果将交互式标志设置为1并输入密码，我将通过ssh远程登录到机器，但是如果我将交互式标志保留为关闭状态或将其设置为0，则登录失败。我确认可以使用Net :: SSH :: Perl登录到本地计算机，因此对于这台特定的远程计算机（在底层操作系统为SuSE），一定是我做错了。我还确认可以从终端窗口SSH到远程计算机。

use Net::SSH::Perl;
my $cmd = 'uptime';
my $ssh = Net::SSH::Perl->new($host, interactive=> 0, debug => 1);
$ssh->login($user, $pass);
my($stdout, $stderr, $exit) = $ssh->cmd($cmd);
print $stdout;

下面是将交互式标志设置为0时从debug输出的日志。

localhost.localdomain: Reading configuration data /home/user/.ssh/config
localhost.localdomain: Reading configuration data /etc/ssh_config
localhost.localdomain: Connecting to 1.1.1.1, port 22.
localhost.localdomain: Remote version string: SSH-2.0-OpenSSH_5.1

localhost.localdomain: Remote protocol version 2.0, remote software version OpenSSH_5.1
localhost.localdomain: Net::SSH::Perl Version 1.38, protocol version 2.0.
localhost.localdomain: No compat match: OpenSSH_5.1
.
localhost.localdomain: Connection established.
localhost.localdomain: Sent key-exchange init (KEXINIT), wait response.
localhost.localdomain: Algorithms, c->s: 3des-cbc hmac-sha1 none
localhost.localdomain: Algorithms, s->c: 3des-cbc hmac-sha1 none
localhost.localdomain: Entering Diffie-Hellman Group 1 key exchange.
localhost.localdomain: Sent DH public key, waiting for reply.
localhost.localdomain: Received host key, type 'ssh-dss'.
localhost.localdomain: Host '1.1.1.1' is known and matches the host key.
localhost.localdomain: Computing shared secret key.
localhost.localdomain: Verifying server signature.
localhost.localdomain: Waiting for NEWKEYS message.
localhost.localdomain: Send NEWKEYS.
localhost.localdomain: Enabling encryption/MAC/compression.
localhost.localdomain: Sending request for user-authentication service.
localhost.localdomain: Service accepted: ssh-userauth.
localhost.localdomain: Trying empty user-authentication request.
localhost.localdomain: Authentication methods that can continue: publickey,keyboard-interactive.
localhost.localdomain: Next method to try is publickey.
localhost.localdomain: Publickey: testing agent key '[email protected]'
localhost.localdomain: Authentication methods that can continue: publickey,keyboard-interactive.
localhost.localdomain: Next method to try is publickey.
localhost.localdomain: Publickey: testing agent key 'user'
localhost.localdomain: Authentication methods that can continue: publickey,keyboard-interactive.
localhost.localdomain: Next method to try is publickey.
Permission denied at /home/user/workspace/perl-random/avamar_ssh.pl line 4.

我猜我做错了什么，所以如果有人可以指出正确的方向，那就太好了。

谢谢。