dogtail keyCombo and rawinput

[tpmoody comcast net]

Can anybody point to more documentation or examples of keyCombo?? I am new to dogtail, but I love it and I hope it works for me. I wrote some code to generate keystrokes, but when I used keyCombo, I got an error back

  File "./demotest.py", line 45, in ?
    dogtail.rawinput.keyCombo("<Control><Meta><Shift><Meta2><Meta3><Alt><NumLock>F1")

I also tried
rawinput.pressKey('F1')

but no luck.  

Thanks
Tim Moody