kerneliocontrolfail

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Hello all,
I am doing porting of our bsp from wince5.0 to wince6.0.
here when kerneliocontrol function is called from driver with
KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwGPIOIRQ ,
sizeof(DWORD),&g_pstGpioInfcData->dwSysIntr, sizeof(DWORD),
&dwBytesReturned));
it fails.
according to my knoledge kerneliocontrol should call oemiocontrol
within it. but after putting messages in oemiocontrol i found that
those messages are not comming. I couldnot find the reason. Please
suggest any possible reason for it.

Thanks
Nihar
.