PIO : output port reset value

Hi,

I am using QUARTUS II 9.1.

I am using some PIO in both input and output mode. One of them is on 24 bits. I would want it to have the next reset value : 0x05003F.

The problem is : ALL the PIO output register bits remain set to '1'. I see it in modelsim and in the VHD file generated by SOPC builder too.

How can i force the reset value to the required one ?

Thanks in advance for your answer.