[Q] SD card works but can not be opened by some apps. How can i fix it

I apologize if this has been thoroughly discussed here, but I can't seem to find much in my own searches.

I don't know what happened but yesterday after i restarted my N1, most of my apps on SD Card couldn't seemed anymore! Apps are on the list, on the desktop and on the apps settings (without original icon). But my system doesn't connect apps on my sd card.

My sd card is working correctly, no problem is there. System is seeing sd card, can be mounted/unmounted.

I've tried to restart (ofcourse),
I've tried to launch different launcher,
I've tried to flash CM again.

But nothing works

How can i fix it without wiping? I would wipe but the backup app (mybackup pro) gives an error "Unable to open database file". So i don' wanna wipe without backing up.

Interestingly, some apps on SD works, but it says it can not see SD card. For example, Go SMS app can backup sms to sd card. But it can not see sd card.

Please help me...

Note: I'm using CM 7.0.2.1 (default kernel 2.6.37.4)

SD Card was corrupted.

Hi again,

I understand that my SD card was corrupted. I ran chkdsk and it couldn't be completed. It gave an error. I formatted with SDFormatter. No bad sectors or damaged. Finally i had to reinstall all apps again. Not wiped rom.