Vista - MS Natural Media Keyboard Button Issue

I have remapped one of the buttons on my keyboard (the Messenger one)
to start a program that I use daily during work. I have Vista 64
Ultimate and the latest MS keyboard software installed, btw, but every
time I boot up or come out of sleep mode this button won't work unless
I start the keyboard app and then close it. Then it will start the
program until it goes into sleep mode or reboots. Quite annoying. The
other buttons for Internet and Email work just fine with the
alternates to MS's stuff that I use but not this custom configured
one. Anyone have any ideas or is it up to Microsoft to resolve? Thanks
for your help.

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