Compact Flash Control

I'm using EP2S60 Board, and trying to write data into a compact flash via the compact flash connector on the board. Now, i'm using the TrueIDE mode to control it. It seems that it works well after reset. However, I can't get DRQ signal after I send write sector or read sector command. I checked the error register, and it returned 0x01 to me. I'm so confused. Who can help me? Thanks in advance!