Simulating of an I2C slave device read problem

Hello I have a problem with simulating an i2c slave device with keil 5.2 and arm cortex m3 LPC1768

I changed the VTREGS of AN153 to simulate the i2c slave (for LPC1768). its completely working when I transmit with completely getting ACK.
from address to write the main register of i2c Slave and data byte but In receive mode the slave address get NOT ACK and then I cant read same number that I wrote before ...

the Slave Address is 0xd0 (like DS1307)
I've got the simulation like this
Sending MASTER 0x68. TRANSMIT x00. 0x0A.
(it will work on 0x68(d0 is 8 bit write address) ,0x00 is the controller register,0xA is my data to load on 0x00 register

in receive mode ill get

Receiving MASTER 68! receive (nothing is here , its blank)

my ini code for i2c simulation is (I've copy that from an153 from keil website) :

// Simulation of I2C Memory (Slave)

MAP 0,0xFF READ WRITE EXEC                  // Map User Memory region

DEFINE int SADR                              // Slave Address

signal void I2CMEMORY (void) {
  unsigned long adr;

  adr = 0;


  while (1) {
    wwatch (I2C2_OUT);                        // Wait for data from Microcontroller
    while (I2C2_OUT == 0x0100) {              // START detected
      wwatch (I2C2_OUT);                      // Wait for data from Microcontroller
      if (I2C2_OUT > 0xFF) continue;
      if ((I2C2_OUT) != SADR) continue;  // test if Slave is addressed

I2C2_IN = 0xFF00;                       // ACK to Microcontroller
      if (I2C2_OUT & 1) {                     // Slave Read
        while (1) {
          I2C2_IN = _RBYTE(adr);              // Read Byte from Memory
          adr++;
          wwatch (I2C2_OUT);                  // Wait for ACK from Microcontroller
          if (I2C2_OUT != 0xFF00) break;
        }
      }

      else {                                 // Slave Write
        wwatch (I2C2_OUT);                    // Wait for data from Microcontroller

         if (I2C2_OUT > 0xFF) continue;
        adr = I2C2_OUT | 0;                 // Set Memory Address
        I2C2_IN = 0xFF00;                     // ACK to Microcontroller
        while (1) {
          wwatch (I2C2_OUT);                  // Wait for data from Microcontroller
          if (I2C2_OUT > 0xFF) break;
          _WBYTE (adr, I2C2_OUT);             // Store Byte in Memory
           adr++;                // Increment Address
          I2C2_IN = 0xFF00;                   // ACK to Microcontroller





}
      }
    }
  }
}


SADR = 0xd0
I2CMemory()

I think this code is just for sending from microcontroller am I right??

Please Help me

thanks