SymmetricCipher Decoder is not working if created dynamically.

[Cornel Maftuleac]

Hello everybody.
I am doing Symmetric Encryption of a plain text buffer using 2 different 
methods, and the results are different... why?
Actually the encryption work's well but the decryption does not work.
See the example following:

#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#include "cryptopp/dll.h"
using namespace CryptoPP;
#pragma comment (lib,"cryptoppd")
int main(int argc, char* argv[])
{
   UCHAR plain[] = "test message";
   UCHAR out_plain[sizeof(plain)];
   UCHAR chiper[sizeof(plain)];
   UCHAR chiper2[sizeof(plain)];
   UCHAR key[DES::DEFAULT_KEYLENGTH];
   UCHAR iv[DES::BLOCKSIZE];
   unsigned bSize = strlen((char*)plain);
   srand(time(0));
   for(int i=0;i<DES::DEFAULT_KEYLENGTH;i++)
       key[i] = rand()%256;
   for(i=0;i<DES::BLOCKSIZE;i++)
       iv[i] = rand()%256;
   {    //THIS PART RUN'S FINE!!!
       DES::Encryption desEncryption(key, DES::DEFAULT_KEYLENGTH);
       CFB_Mode_ExternalCipher::Encryption cfbEncryption(desEncryption, 
iv);
      
       DES::Encryption desDecryption(key, DES::DEFAULT_KEYLENGTH);
       CFB_Mode_ExternalCipher::Decryption cfbDecryption(desDecryption, 
iv);
      
       cfbEncryption.ProcessData(chiper, plain,bSize);
       cfbDecryption.ProcessData(out_plain, chiper,bSize);
   }
   
   {    //THIS PART DOES NOT WORK!!!
       //even if it should be the same as previous...
       //encrypt work's ok the chiper and chiper2 is equal, but the 
out_plain is different!

       DES::Encryption *chpEnc = new DES::Encryption(key, 
DES::DEFAULT_KEYLENGTH);
       CFB_Mode_ExternalCipher::Encryption *cfbEncrypt
           = new CFB_Mode_ExternalCipher::Encryption(*chpEnc, iv);
       DES::Decryption *chpDec    = new DES::Decryption(key, 
DES::DEFAULT_KEYLENGTH);
       CFB_Mode_ExternalCipher::Decryption *cfbDecrypt
           = new CFB_Mode_ExternalCipher::Decryption(*chpDec, iv);
      
       cfbEncrypt->ProcessData(chiper2, plain, bSize);
       cfbDecrypt->ProcessData(out_plain, chiper2, bSize);
       delete cfbEncrypt;
       delete cfbDecrypt;
       delete chpEnc;
       delete chpDec;
   }
      

   return 0;
}