logger message display

My application has a GUI similar to the wxPython demo's: a panel and a
static text control in a splitter window. The text control is for
logging events while the application is running.
The application main activity is a sequence of actions (executions of commands from an external application and gui updates) driven by events
generated by the sequence itself.
Logger messages are generated while the sequence is running using the
wx.LoggerMessage method.
The problem is that messages are not displayed in the log window until
the sequence is over, so it is quite impossible to see what's going on:
the sequence can last very long and getting fresh information
about it can be useful for users.
Moreover, that happens only if I use wxPythton compiled with gtk+-2.x, but not with wxPython compiled with gtk+-1.x.
So, how can I force the upgrade of the logger window?

Thanks in advance

                 Angelo Pozzi

Tech details:
wxPython 2.6.1.0 with gtk+-2.6
python 2.4.1
platform HP 9000/800
OS HP-UX 11.11