software did not start if SDHC inserted

Hi,

I used SD_Card_Controller_SPI in my system.It's ok if I inserted a SD(1.0) card into the slot.But If I inserted a SDHC card into the slot the software can not start while there were signals on 4 spi pin,it means that I can not run/debug the software as hardware,and ater programmed into flash the software also did not start.

I read sd_controller.v carefully, but found nothing that maybe the reason.

Can anyone give some help?

Thanks in advance.

LiuJN