Virtual Memory leak

/*
открывается файл так:
this->fd = CreateFile(fileName.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_READONLY & FILE_FLAG_OVERLAPPED, NULL);
*/

unsigned char * TBinFile::ReadBlock(__int64 * red, long n)
{
 unsigned long really_red = 0;
 if (this->fd != NULL) {
   if (this->pos >= this->Size()) {
    (*red) = -1;
    this->Seek(0);
    return NULL;
   }
   unsigned char * data = new unsigned char[n];
   __int64 remain = this->size - this->pos;
   if (remain >= n) {
    ReadFile(this->fd, data, n, &really_red, &seek_st);
   } else {
    ReadFile(this->fd, data, remain, &really_red, &seek_st);
   }
   (*red) = really_red;
   this->pos += (*red);
   if ((*red) == 0) {
    this->Seek(0);
   }
   return data;
 }
 return NULL;
}

bool TBinFile::Seek(__int64 pos1)
{
 if (this->fd != NULL && pos1 <= this->Size()) {
    this->seek_st.Offset = pos1;
    this->seek_st.hEvent = NULL;
 } else {
    this->seek_st.Offset = 0;
    this->seek_st.hEvent = NULL;
    return false;
 }
 return true;
}

//////

toUploadBytes = this->files[file]->Size();
this->chunk_size = 1024*1024*2;
data2 = new unsigned char[chunk_size];
data2 = this->files[file]->ReadBlock(&block_size, chunk_size); // чтение из файла
if (block_size < 1) {
 (*red) = 0;
 return "";
} else {
 (*red) = block_size;
}


// дальше посыл через сокет.