Another boot problem (2 replies)

Hi everyone,
i'm here to request some help. I have a sheevaplug with latest uboot version (2013.10-2), i just buy a new sd card and install debian (wheezy) on it. Everything works just fine, but the sheeva don't autoboot on the new sd card. I've done all step, finishing the debian install with the :

setenv bootargs_console console=ttyS0,115200
setenv bootcmd_mmc 'mmc init; ext2load mmc 0:1 0x00800000 /uImage; ext2load mmc 0:1 0x01100000 /uInitrd'
setenv bootcmd 'setenv bootargs $(bootargs_console); run bootcmd_mmc; bootm 0x00800000 0x01100000'
saveenv

What's strange is that my older card doesn't have any problem with autobooting when i replace the new one. Saying that, the new card doesn't have any problem booting too, but i just need to connect with the serial and run 'boot' in uboot and everything go just fine. But going through serial for booting isn't really practical.

Can you please help me figure out what's happening ? I've compared both card fdisk, and they look the same (exept for the 'Disk identifier').
Thank you (and please forgive my english).

br,