[LDTP-Dev] about "Unable to find window"

[esolve esolve]

 I have 2 laptop A and B, A is with fedora 16 and 64bit, B is with fedora
16 and i686

  I'm using a modified firefox called Tor browser bundle.

  for firefox, on both A and B , I can use selectmenuitem ('*Firefox',
'mnuTools;Add-ons') successfully

  for the modified firefox, the window title is "Tor Browser Start Page -
Tor Browser"

  I use selectmenuitem ('*Browser', 'mnuTools;Add-ons') successfully on A,

  but on B

  >>> selectmenuitem ('*Browser','mnuTools;Add-ons'
)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/ldtp/client.py", line 69, in
__call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1578, in __request

    verbose=self.__verbose
  File "/usr/lib/python2.7/site-packages/ldtp/client.py", line 184, in
request
    raise LdtpExecutionError(e.faultString.encode('utf-8'))
ldtp.client_exception.LdtpExecutionError: Unable to find window "*Browser"

   and "guiexist()" test result is also 0
  generally speaking, what are the reasons for this error? can anyone give
me some hint? thanks!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/ldtp-dev/attachments/20121011/85676707/attachment.html>