i want to write a small app that sends the pre directly to sleep when the icon is pressed, so that i dont need to push the hardware button or wait the timeout.

I have made some dbus capture when the hardware button is pressed and found this:

20854.905	PRV	signal	5635		com.palm.power	<none>	/com/palm/power/suspendRequest	«string=“{}”, string=“com.palm.power”»
How can i initiate such a request (signal). I tried dbus-send but it doesnt work. Or is there a other way of sending the pre to sleep(undiscovered luna send, java service)?