MP3 SHIELD on my ChipworkX_DevSys examples of problems

I try MP3 SHIELD on the ChipworkX_DevSys example, modify the SDI_CS (FEZ_Pin.Digital.Di2), SCI_CS (FEZ_Pin.Digital.Di9) and DREQ (FEZ_Pin.Digital.Di3), SDI_CS on the ChipworkX_DevSys (PA15/MP3_XDCS), SCI_CS (PC4/MP3_XCS) and DREQ (PC7/MP3_DREQ), no sound from the results, do not know where the error is? is it because there is no external DC adapter?

This demo already include the drivers for the MP3 decoder