My 640 says my memory card is unavailable

[Mikepoint]

I have a 640 which I've had no problem with since the day I brought it. Less than a week ago it powered off, rebooted , all was well but, all my apps stored on my memory card saying "unavailable". My phone is not recognizing my memory card. Is there a cure for this, please help!

 

[LumPhile]

You could try this:
Power off device
Remove battery
Reseat sd card
Replace battery
Power on phone

 

[Mikepoint]

Thanks for the suggestion, I've tried that before. It's turns out the problem was a broken update, that last update corrected my situation. I appreciate your goodwill, and again, Thank You