wxTimer problem

[abcd]

I have a python script which creates a wx.App, which creates a wx.Frame
(which has a wx.Timer).

looks sorta like this:

class MyProgram:
    def __init__(self):
        self.app = MyApp(0)
        self.app.MainLoop()

class MyApp(wx.App):
    def OnInit(self):
        self.myframe= MyFrame()
        self.myframe.Show(True)
        self.SetTopWindow(self.myframe)
        return True

class MyFrame(wx.Frame):
    def __init__(self):
       # do some other stuff here

       # setup the timer
        self.timer = wx.Timer(self)
        self.Bind(wx.EVT_TIMER, self.OnTimer, self.timer)
        self.timer.Start(100)

    def killTimer(self):
        self.Unbind(wx.EVT_TIMER)
        self.timer.Stop()
        self.timer = None


....that's the jist of it.

Anyhow, so I startup python and import my script, which loads up the
wx.App, frame and all.

foo = MyProgram()


Then I close the frame.  when the frame is closed it calls killTimer.
This method gets called and no exceptions occur.

Then...I create a new instance of the app and try to load the frame
again.

foo = MyProgram()

...and I am getting this error:

"timer can only be started from the main thread"

how can I fix this??

FYI, my script is being started by a new thread each time, so
ultimately we have....

def startProgram():
    foo = MyProgram()

threading.Thread(target=startProgram).start()


Thanks in advance.