Try this again:
1 fomat your 1G SD card to FAT use the windows tool.
2 Dowload the fileloger library and demo code to your Arduino.
3 sent the “W” to Arduino use the serial monitor of IDE.
4 see the responses on the serial monitor , the first time it may be " Result: Fail initializing"
5 sent the “W” again until respons is “OK” .
for some card I have to try 3 times it return OK and then you can use it as normal. I don’t know why specifically but it must be the code error.