Be aware that we are working still on it, to see if we can confirm this is the case. Note also, that the problem may even be in the Windows Pocket ISR itself. If the problem is in the ISR routine in Windows Pocket PC implementation it may be fixable. If the problem is located in the microcontroller there is no way to fix this, other than reprogram the microcontroller code. Microcontroller code is in Flash ROM, which in principle give us an open door to fix the problem.
Suggestions are welcome.
Some of those may lead to misunderstanding, the following is our comment. Microcontroller inside iPaq is Atmel AT90. This device may be reprogrammed at low voltages without using 12V. A serial interface protocol must be used in this case. However, some protection bits may prevent any reprogramming when set. We don't know at this time whether these bits are set or not.