SPI bus

Hi again!

I hope you would help me with a misterious trouble:

I have a spi bus wich contains ade9000 arduino shield, ade9078ebz, one sram (sram is only for testing).

When I try to comunicate ade9078 and sram, no problem.

When I power up the ade9000 board, the spi miso channel stays high (I can still receive data from ade9000 but can't from sram and ade9078).

Is there any configuration I'm overlooking?

Thanks in advance.