Samsung Blackjack - corrupted ring tones  

Hi all, I have an AT&T Samsung Blackjack II (AKA the Pinkjack because, well, you know... it's the PINK ONE!!!!!) I've had it since september and one day I attempted to delete all the files in my SENT text message folder and then the next day I couldn't figure why my stupid alarm clock never went off... Later that day, my phone rang, only I didn't realize it was my phone because it was no longer Right Round, it was some random icky default ring tone (you know, 'came with the phone' ring tone)... So, I went to change the ring tone back and ALL of my song ring tones and some of the default ring tones say "This ring tone file is corrupted or unavailable. Please choose a different ring tone."

I dont go online with the phone... I only got it because it was pretty and I wanted a phone with a letter keypad for easier texting...

Before I waste my time with AT&T, do any of you know why my ring tones are suddenly corrupted? (I can't even chose 'NONE' or 'VIBRATE' as a ring tone because they, too, are corrupted!)

Fran429