Reading/Writing to SD Card using a PIC

We're trying to read and write to an SD card using a PIC18F452. CMD0 and CMD1 work (to initialize the SD card into SPI mode), but any other command after that including CMD0 and CMD1 don't respond.

Any help wil be greatly appreciated.
SETPAsked:
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d-glitchConnect With a Mentor Commented:
Is an SD card the same thing as a CompactFlash card??

Maybe this recent article from EDN will be helpful:   http://www.edn.com/contents/images/6363906.pdf

Afraid I can't be much help otherwise.  You are probably several month ahead of me.
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d-glitchConnect With a Mentor Commented:
I see that the SD is a special type of Flash.

And I see these links:

     http://www.compsys1.com/workbench/On_top_of_the_Bench/MMC_Project/mmc_project.html

     http://www.k9spud.com/sdcard/
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publicCommented:
Compact flash card uses a parallel interface, SD card uses a serial interface.
Try monitoring the clock and data lines with a scope to see any activity when the card does not respond.
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