Arduino UNO + Arduino Ethernet Shield - can't read SD card

Hi everyone,

I'm having trouble with my SD card and I've tried what SurferTim said, but I keep getting the "Card failed or not present" message, I wanted to ask you where exactly do I have to connect the pins of the SD card on the Arduino (I'm using an Arduino UNO Rev3), I've already tried connecting the CS pin of the card on digital pins 4 and 10 but didn't work either way.

Thank you in advance for your help!