Problem in TLM READ command

Hi all,

I'm getting problem in TLM read command .Please check the code once is am doing right ?Then why it's not reading correct value's?

  In read function.....i'm going through b_transport....

    tlm::tlm_generic_payload* trans=new tlm::tlm_generic_payload;
    sc_time delay=sc_time(0,SC_NS);
    trans->set_command(tlm::TLM_READ_COMMAND);
    trans->set_address(addr);
    if((dmi_valid)&&(addr >=dmi_data.get_start_address()) && (addr<=dmi_data.get_end_address())){
        SC_REPORT_INFO_VERB("Traffic_injector","dmi access",2);
    }else {
        SC_REPORT_INFO_VERB("traffic injector","READ:normal access....",2);
        trans->set_data_ptr(reinterpret_cast<unsigned char*>(data));
        trans->set_data_length(length);
        trans->set_byte_enable_ptr(0);
        trans->set_response_status(tlm::TLM_INCOMPLETE_RESPONSE);
        initiator_socket->b_transport(*trans,delay);
        if(trans->is_response_error()){
            SC_REPORT_ERROR("TLM-2","response error from b_transport");
        }
        unsigned char* data_ptr=trans->get_data_ptr();

  In b_transport ....

      tlm::tlm_command cmd=trans.get_command();
      uint8_t addr=trans.get_address();
      unsigned char* data_ptr=trans.get_data_ptr();
      unsigned int len=trans.get_data_length();
        
      if(cmd==tlm::TLM_READ_COMMAND){
        
            bool flag=(bool)((device_rx_data[addr]>>len)& 0x1);

             data_ptr=reinterpret_cast<unsigned char*>(&flag);

      }
 

In b_transport it setting correct values to data_ptr (as am checked in debugger).But in read

    unsigned char* data_ptr=trans->get_data_ptr();

am getting always zero...Is am doing right casting ?If not tell correct path?

Thanks,

Pruthvi