Java Security

I have some problem in performing in decrypting a string in BC which was encrypted using Crypto++ in c++ application using RSA encryption.

All the symmetric algorithms works fine , the problem is only with RSA.

Below is the code i have written to encrypt a string using crypto++

// rebuild the public key
    RSAFunction rs;
    Integer it("116297669686057679294877276879567246299222268120848197352278975150952126198908382362376665650470513975918339553377750756634487177347348719348381933238208421600325762381904044278291970012585654988470536793991370300324551834827906496125133540743511381486547013572102549606765658314029348528132264092602915745569");
    
  rs.SetModulus(it);
  rs.SetPublicExponent(65537);

 HexEncoder  pubFile(new FileSink(publicFilename.c_str()));
 rs.DEREncode(pubFile);
 pubFile.MessageEnd();

//perform encryption
   FileSource pubFile(pubFilename, true, new HexDecoder);
    RSAES_PKCS1v15_Encryptor pub(pubFile);

    RandomPool randPool;
  
    string result;
    StringSource(message, true, new PK_EncryptorFilter(randPool,   pub,    new Base64Encoder(new StringSink(result))));
    

And here is the java code for decryption...

cipher = Cipher.getInstance("RSA/NONE/PKCS1Padding", "BC");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
result = cipher.doFinal(Base64.decode(in));

At this point i get the following exception.....

java.lang.ArrayIndexOutOfBoundsException: too much data for RSA block
at org.bouncycastle.jce.provider.JCERSACipher.engineDoFinal(Unknown Source)
at javax.crypto.Cipher.doFinal(DashoA12275)

any suggestions to resolve this problem is appreciated