[pox-dev] Nicira errors

[Mayumi Park Campos]

Hi all, 
I try to run pox with this line: 
./pox.py log.level --DEBUG openflow.nicira forwarding.l2_nx
And get this reply on the screen: POX 0.1.0 (betta) / Copyright 2011-2013 James McCauley, et al.

INFO:forwarding.l2_nx:Simple
NX switch running.

DEBUG:core:POX
0.1.0 (betta) going up...

DEBUG:core:Running
on CPython (2.7.3/Aug 1 2012 05:16:07)

DEBUG:core:Platform
is Linux-3.2.0-41-generic-pae-i686-with-Ubuntu-12.04-precise

INFO:core:POX
0.1.0 (betta) is up.

DEBUG:openflow.of_01:Listening
on 0.0.0.0:6633

INFO:openflow.of_01:[00-50-04-9d-16-db
1] connected

ERROR:openflow.of_01:[00-50-04-9d-16-db
1] OpenFlow Error:

[00-50-04-9d-16-db 1] Error: header: 

[00-50-04-9d-16-db 1] Error:   version: 1

[00-50-04-9d-16-db 1] Error:   type:   
1 (OFPT_ERROR)

[00-50-04-9d-16-db 1] Error:   length: 
32

[00-50-04-9d-16-db 1] Error:   xid:    
6

[00-50-04-9d-16-db
1] Error: type: OFPET_BAD_REQUEST (1)

[00-50-04-9d-16-db
1] Error: code: OFPBRC_BAD_SUBTYPE (4)

[00-50-04-9d-16-db 1] Error: datalen: 20

[00-50-04-9d-16-db 1] Error: 0000: 01 04 00 14 00 00 00
06  00 00 23 20 00 00 00 10   ..........# ....

[00-50-04-9d-16-db 1] Error: 0010: 00 00 00 01                                        ....

INFO:forwarding.l2_nx:[00-50-04-9d-16-db 1] ready
And I lose communication with the hosts
I don't see where is the problem and don't know how to correct it.
Thanks in advance 
 		 	   		  
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