Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)

My Image is fine because its being decompress but I don't know where
the problem persist .I built my ramdisk using busybox

www.linurs.org/pdf/limux.pdf

but it is showing :

List of all partitions:
b300 3887104 mmcblk0 driver: mmcblk
  b301 66076 mmcblk0p1
00000000-0000-0000-0000-000000000mmcblk0p1
  b302 3820368 mmcblk0p2
00000000-0000-0000-0000-000000000mmcblk0p2
No filesystem could mount root, tried: ext2
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-
block(1,0)

I checked my partition and mmc driver .Its working fine !!

I am still not able to sort out this problem . Whether it is mmc
driver problem or my file system problem .How to fix this issue ?