sd card not working

[cozmic]

my 8gb Sandisk card just stopped working.
my phone can't see it (using file explorer or activesync)
is there anyway to tell if its the phone or the card?
i'm on vacation with no card reader - only my laptop.

btw i had just flashed mightyrom 6 and it was working well.
then it stopped.
i did a hard resest to see if that would help and it did not.

one thing i did differently for this flash (my 1st time using a mighty rom) was after i flashed it instead of doing a hard reset, i used the clear memory reset option
but i don't think this has anything to do with it.

any ideas?

thanks,
charlie