Add IP in QSYS

I'm trying to change my nios2 by adding PIO IP in my Qsys, but the result is wrong.

bellow is my step:

1.add PIO IP in QSYS (set five input)

2. click system>>assign base address

3.ctrl+s(save QSYS), and generate HDL

The steps in QSYS

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1.add export name in main code.

2.compilar(the pin was set already ).

The steps in Quartus

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1. "clean project" -> ''NIOS2">>"generate BSP" -> Build project (in bsp folder)

2.''NIOS2">>"Editor BSP" -> Build project (in main.cpp folder)

The steps in Eclipse

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final i combine .sof and .elf to .jic(this step is confirm )

thank's for anyone to give me advice