znalazlem odpowiedz na wasz problem jest na stronie producenta
http://www.spbsoftwarehouse.com/products/gprsmonitor/support.html?en#windows_2003a dokladnie fragment
Today Plug-In. Backlight control does not work on my Pocket PC.
Backlight implementation is different on different Pocket PC devices.
Spb GPRS Monitor 2.0 supports backlight control on the following Pocket PC devices:
Compaq iPAQ 3600 and 3700 Series
Compaq iPAQ 3700 and 3900 Series
HP iPAQ 1900 Series
HP iPAQ 5400 Series
Toshiba e740
HP Jornada 560 Series
T-Mobile Pocket PC Phone Edition
We continue adding backlight support for other Pocket PC devices. Minor update versions will include backlight support for other devices. You can help us by downloading a special wizard like program that collects all necessary information to add backlight support for this device. This ARM executable program can be downloaded from:
DeviceInformationCollectorTool.exe.
Today Plug-In. When I click to the backlight icon backlight applet is not shown.
Some Pocket PC devices use non-standard applets for battery and backlight settings. Spb GPRS Monitor "knows" about all major Pocket PC devices. Nevertheless new devices appear on the market and it could happen that your Pocket PC device contains non-standard applets for battery and backlight and Spb GPRS Monitor does not "know" about your Pocket PC device. Please fill in the form on this page and provide data bout your device and we will try to add support for your Pocket PC device in the next update of Spb GPRS Monitor.
czyli mozecie wspomodz prgram

i w next wersji moze juz bedzie dzialac;)