xftp 链接 linux 上传失败
用 xftp 链接 虚拟机上边的 linux 中 的 tomcat 上传项目的时候，报错
错误信息如下：
STATUS:>Listing folder completed.
STATUS:>Listing folder '/j2ee/tomcat/webapps'...
STATUS:>Listing folder completed.
STATUS:>Listing folder '/j2ee/tomcat/webapps'...
STATUS:>Listing folder completed.


[#1 of '192.168.78.128']Transfer failed: 'saa'.
[#1 of '192.168.78.128']Starting transfer...
[#1 of '192.168.78.128']Creating the folder 'saa'...
[#1 of '192.168.78.128']Creating the folder failed.
[#1 of '192.168.78.128']Changing to the folder 'saa'...
[#1 of '192.168.78.128']Changing folder failed.
[#1 of '192.168.78.128']Transfer failed: 'saa'.
[#1 of '192.168.78.128']Starting transfer...
[#1 of '192.168.78.128']Creating the folder 'saa'...
[#1 of '192.168.78.128']Creating the folder failed.
[#1 of '192.168.78.128']Changing to the folder 'saa'...
[#1 of '192.168.78.128']Changing folder failed.
[#1 of '192.168.78.128']Transfer failed: 'saa'.

这是怎么回事啊？
xftp 链接 以后，可以用命令启动和停止tomcat 啊，为什么不能上传项目啊？