How to remount MMC card on gumstix?

[Podi]

Hi,

I have a Gumstix running Linux as follows:

# uname -a
Linux gumstix 2.6.11gum #1 Wed Feb 1 16:53:57 PST 2006 armv5tel
unknown

I am using the MMC card to collect data from an application and need
to periodically swap the card. I have tried the sequence below but
unsuccessful.

# umount /mnt/mmc
### Pull the MMC card out from the slot
### Put the same card back into the slot
# mount /mnt/mmc
mount: Mounting /dev/mmc/mmc0/part1 on /mnt/mmc failed: Input/output
error

Is there a way to do this at all? If so, what should be the proper
sequence/procedure?

Thanks for any help.
P