facing problem while using with SD card

[embhobbb]

I am using backsoon example with enc28j60 module and arduino mega 2560 board. If i use only enc28j60 module and arduino mega 2560 board then everything works fine but when i just connect SD card and making Chip select pin HIGH for SD card then it doesn't work.
do I have to take care of anything like pin management?
I have noticed that many people are facing the same problem if we use combinations like SD card, ENC28j60, and Arduino.