pad block corrupted

[luca Sinzio]

I'm developing a MIDlet for SMS encrypting. I use the AESlight (Rijndael) algorithm for cipher/decipher (usign Bouncy Castle APIs).
I cipher the sms then I send it as a BINARY message (because I can't trasform the ciphered text froma byte array to a String and then back to a byte array, without loosing data).
But when I decipher the received sms i get the "pad block corrupted" error message.
I tried to test if the decipher code was right adn it is, in fact on the sender side it decipher correctly the ciphered text. Then I checked if the received byte array would be the same of the sent one, and still it's right!

Here is the code I use to decipher:

AESLightEngine engine = new AESLightEngine();
CBCBlockCipher cbc = new CBCBlockCipher(engine);
BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(cbc);
ParametersWithIV piv = new ParametersWithIV((new KeyParameter(AESkey)),initVector);

cipher.init(false, piv);
 
byte[] result = new byte[cipher.getOutputSize(cipheredText.length)];
int len = cipher.processBytes(cipheredText, 0, cipheredText.length, result, 0);
 
cipher.doFinal(result, len);
plainText = new String(result);    

Can someone help me finding a solution?
Is the problem in the binary message?
Here the code of sending the binary message:

 smsconn = (MessageConnection)Connector.open(address);
BinaryMessage binmessage = (BinaryMessage)smsconn.newMessage(MessageConnection.BINARY_MESSAGE);
binmessage.setAddress(address);
binmessage.setPayloadData(binaryTextToSend);
smsconn.send(binmessage);   

Thank you in advance!