I cannot mount the SD card

I try to follow the steps in the Validating Beagle Board with Tests/Diagnostics. I am trying to mount the SD Card but it says

[root@beagleboard /]# mount -t vfat /dev/mmcblk0pl /mnt/mmc/
mount: mounting /dev/mmcblk0pl on /mnt/mmc/ failed: No such file or directory

Please tell me how to fix this!

I don’t know where I can find the information about the mmcblk0pl. Please tell me.

Best regards,
Thang Nguyen

I am sorry, it’s a type mistake.