Decryption Problems with Curve 8520

[sairus]

Ok .
My BB Encryption is on for both . Device memory and Media card ..
Strength - Strongest .
Contacts : NO
Media file : NO

Mode is Device password only .. ( not device key )

___

Ok my problem started yesterday . that I could not view and kind of encrypted file on my BB . this includes my BBM history . also some saved text files and documents for my work .
And because of the encryption . its normal to all these files become a . REM
When I open any encrypted TEXT or office Doc or Excel .. . its blank .. Empty .. or I get this error message ( Error Decrypting header ) when opening a document file ..

* OK .. this means .. my blackberry Can NOT Decrypt my files anymore .. ..

recently .. I have not changed my password .. and I did not changed anything with the encryption settings .


solution I tried . but did not work .

1- wipe of my BB and restore . the device asked that a memory card which is encrypted and asked for a password .. and I put the pass correctly
2- delete everything on my MMC and format and copy back again ..

Nothing worked still when I open the Encrypted files .. its empty ..

Soo .. any ideas ?????