[orca-list] Liblouis is not working my mistake, please help if this is possible

[Hammer Attila <hammera pickup hu>]

Hy,

I try testing only source building Orca and development Liblouis 
version, because I would like determining why happening following 
interesting bug:
https://bugzilla.gnome.org/show_bug.cgi?id=651264
I would like determining this bug is a Liblouis or Brltty related issue, 
or Orca issue, so I would like using latest sources to test this bug. I 
don't understand Orca contracted braille feature why sending 4567 dot 
combination with braille display if I write _ character or ly letter 
exception, I defined only the 456 dot combination my nev development 
contraction table. Other six dots based dot combinations is working full 
right.

Unfortunately, after I removed all factory installed Liblouis related 
packages my Ubuntu Lucid system and recompiled Liblouis related 
development sources and Orca, I see following traceback error message 
the Orca debug output, Orca contracted braille feature unfortunately not 
working now my system:
Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/orca/braille.py", line 
1706, in _brlAPIKeyReader
    key = _brlAPI.readKey(False)
  File "brlapi.pyx", line 529, in brlapi.Connection.readKey
OperationError: Invalid packet on Write request of size 169 (76 00 00 00 
00 00 00 01 00 00 00 46 00 00 00 49)

I doed the source compilations with following manual based:
http://live.gnome.org/Orca/Braille

I newer see this type traceback error message. What can I mistake?
I very hopefuly not need reinstalling my system, please help if you have 
a little time.
I using Ubuntu Lucid, latest Orca master development version and Latest 
Liblouis trunk version.

Attila