[Pythonmac-SIG] appscript: click command not working

[Demian Godon]

Question from a newbie (to both applescript and python):
Can someone please explain why the following script does not cause the 
"Start Server" button to be clicked?
<Begin>
#!/usr/bin/pythonw

from appscript import *


app('/Applications/Utilities/OSXvnc.app').activate()

app('System 
Events').application_processes['OSXvnc'].windows[1].buttons[4].click()
<End>

The equivelant applescript works:
activate application "OSXvnc"
tell application "System Events"
            tell application process "OSXvnc"
                -- GUI Scripting statements:
                click button 4 of window 1
            end tell
end tell

Thanks,

-D