WHY DOES MY BLACKBERRY 8520 CURVE KEEP LOADING LIKE FOREVER WHENEVER IT POWERS ON?

[Fizzle]

PLEASE I NEED HELP..MY BLACKBERRY CURVE KEEPS LOADING WHENEVER IT POWERS ON AND STAYS ON THE WHITE LOADING SCREENWITH THE SMALL TIMER..LIKE ALMOST A WEEK NOW,IV TRIED TO REMOVE AND PUT THE BATTERY BACK.NOTHING YET NAD MY PHONE DIDNT FALL OR ANYTHING..PLEASE I NEED URGENT HELP ITS QUITE FRUSTRATING