Connection lost, no any screen show

[herlang]

hzh@ISCAS:~$ sudo ssh docker@192.168.1.103 -p 32773 ./docker-desktop -s 800*600 -d 10
docker@192.168.1.103's password:

---

Configuring the screen resolution -> 800*600

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Configuring the session number -> 10

Entering daemon mode; any further errors will be reported to:
/home/docker/.xpra/:10.log
server requested disconnect: shutting down
xpra at :10 has exited.
Entering daemon mode; any further errors will be reported to:
/home/docker/.xpra/:10.log

---

Session started!

---

Please press Control-C if you are running it directly from the ssh command line.

hzh@ISCAS:~$ xpra --ssh="ssh -p 32773" attach ssh:docker@192.168.1.103:10
xpra client version 0.12.3
docker@192.168.1.103's password: 2015-04-23 16:52:07,210 PyOpenGL warning: missing accelerate module
2015-04-23 16:52:07,211 PyOpenGL warning: missing array format handlers: numpy, numeric, vbo, vbooffset
2015-04-23 16:52:07,211 OpenGL Version: 2.1 Mesa 10.1.3
2015-04-23 16:52:07,336 detected keyboard: rules=evdev, model=pc105, layout=us
2015-04-23 16:52:07,336 desktop size is 1680x1050 with 1 screen(s):
2015-04-23 16:52:07,337 ':0.0' (444x277 mm) workarea: 1615x1026 at 65x24
2015-04-23 16:52:07,337 VGA1 (474x296 mm)
2015-04-23 16:52:27,352 connection timed out

2015-04-23 16:52:27,554 Connection lost
hzh@ISCAS:~$

[LeoJiaXin]

See line 3 in console log，docker@192.168.1.103's password:...,
xpra may use a null password to start it