I have a problem with emdebian decompression in sd card

Xavis
Hello

I have a problem to decompress "emdebian-grip-071
910-armel-debootstrap-squeeze.tar.bz2" in an SD card

I have partitioned the SD card in "boot (ext2)" and "rootfs (ext3)"

It is for the device micro2440, 7 "

Anyone know the correct way to decompress emdebian on an SD card?, Please

I tried many ways (I have written "unp emdebian-grip-071
910-armel-debootstrap-squeeze.tar.bz2 / media / rootfs /" and others)
but none has worked for me because it always responds terminal:

"Failed to detect file type of / media / rootfs, skipping ..."

I have no idea, what's the problem

I really need your help please

thanks
regards.