I include file "midiclientutility.h" into my project. But when built error occurs:

error: 'EOpen' has a previous declaration as `TMidiState EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/midiclientutility.h] line 99
error: 'EOpen' has a previous declaration as `TWlanSecMode EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/ApEngineConsts.h] line 202
error: conflicting declaration 'EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/ApEngineConsts.h] line 202
error: conflicting declaration 'EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/midiclientutility.h] line 99
error: conflicts with previous declaration `TMidiState EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/midiclientutility.h] line 99
error: conflicts with previous declaration `TWlanSecMode EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/ApEngineConsts.h] line 202
error: declaration of `EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/ApEngineConsts.h] line 202
error: declaration of `EOpen'[/Symbian/9.2/S60_3rd_FP1/EPOC32/include/midiclientutility.h] line 99
Can anyone help me?