云服务器远程连接于登陆出错，怎么解决？

[font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]用PUTTY无法连接登陆。
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[font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]用XSHELL链接，好像是链接成功了，但是出现这样的提示，你们帮我看看，具体问题出在哪儿。。。 [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]

[font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Xshell 4 (Build 0123) [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Copyright (c) 2002-2013 NetSarang Computer, Inc. All rights reserved. [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Type `help' to learn how to use Xshell prompt. [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Xshell:\> [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Connecting to 121.199.34.58:22... [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]Connection established. [font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]To escape to local shell, press 'Ctrl Alt ]'.
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[font='Lucida Grande', Helvetica, Arial, Verdana, 微软雅黑, sans-serif]请教各位高人呐