diff --git a/dynamixel_manager/include/modules/walk_registers.h b/dynamixel_manager/include/modules/walk_registers.h
index ffcb8e111539e26bed6623f5577de4ee66be69c8..edbfd9e1097fe12cd83198480c31c41758fdc1d4 100644
--- a/dynamixel_manager/include/modules/walk_registers.h
+++ b/dynamixel_manager/include/modules/walk_registers.h
@@ -52,7 +52,7 @@
 unsigned short int name##_eeprom_data[] __attribute__ ((section (section_name))) __attribute__ ((aligned (4)))= {\
   DEFAULT_X_OFFSET,base_address+WALK_X_OFFSET, \
   DEFAULT_Y_OFFSET,base_address+WALK_Y_OFFSET, \
-  DEFAULT_Z_OFFSET,base_address+WALK_Y_OFFSET, \
+  DEFAULT_Z_OFFSET,base_address+WALK_Z_OFFSET, \
   DEFAULT_ROLL_OFFSET,base_address+WALK_ROLL_OFFSET, \
   DEFAULT_PITCH_OFFSET,base_address+WALK_PITCH_OFFSET, \
   DEFAULT_YAW_OFFSET,base_address+WALK_YAW_OFFSET, \
diff --git a/dynamixel_manager/src/modules/walk.c b/dynamixel_manager/src/modules/walk.c
index b5fedefedbf49eae3f04b0dec4a9f90b84aa027f..c2fdfc80cd48198668b76ed9ae14ec7eb021e1e8 100755
--- a/dynamixel_manager/src/modules/walk.c
+++ b/dynamixel_manager/src/modules/walk.c
@@ -33,33 +33,33 @@ void walk_write_cmd(TWalkMModule *module,unsigned short int address,unsigned sho
     module->memory->data[module->ram_base_address+WALK_STEP_DIRECTION]=data[WALK_STEP_DIRECTION-ram_offset];
   // walk parameters
   eeprom_offset=address-module->eeprom_base_address;
-  if(ram_in_range(module->ram_base_address+WALK_R_HIP_ROLL_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_HIP_ROLL_SERVO_ID,address,length))
     module->right_hip_roll_servo_id=data[WALK_R_HIP_ROLL_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_HIP_YAW_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_HIP_YAW_SERVO_ID,address,length))
     module->right_hip_yaw_servo_id=data[WALK_R_HIP_YAW_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_HIP_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_HIP_PITCH_SERVO_ID,address,length))
     module->right_hip_pitch_servo_id=data[WALK_R_HIP_PITCH_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_KNEE_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_KNEE_SERVO_ID,address,length))
     module->right_knee_servo_id=data[WALK_R_KNEE_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_ANKLE_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_ANKLE_PITCH_SERVO_ID,address,length))
     module->right_ankle_pitch_servo_id=data[WALK_R_ANKLE_PITCH_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_ANKLE_ROLL_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_ANKLE_ROLL_SERVO_ID,address,length))
     module->right_ankle_roll_servo_id=data[WALK_R_ANKLE_ROLL_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_R_SHOULDER_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_R_SHOULDER_PITCH_SERVO_ID,address,length))
     module->right_shoulder_pitch_servo_id=data[WALK_R_SHOULDER_PITCH_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_HIP_ROLL_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_HIP_ROLL_SERVO_ID,address,length))
     module->left_hip_roll_servo_id=data[WALK_L_HIP_ROLL_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_HIP_YAW_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_HIP_YAW_SERVO_ID,address,length))
     module->left_hip_yaw_servo_id=data[WALK_L_HIP_YAW_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_HIP_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_HIP_PITCH_SERVO_ID,address,length))
     module->left_hip_pitch_servo_id=data[WALK_L_HIP_PITCH_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_KNEE_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_KNEE_SERVO_ID,address,length))
     module->left_knee_servo_id=data[WALK_L_KNEE_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_ANKLE_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_ANKLE_PITCH_SERVO_ID,address,length))
     module->left_ankle_pitch_servo_id=data[WALK_L_ANKLE_PITCH_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_ANKLE_ROLL_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_ANKLE_ROLL_SERVO_ID,address,length))
     module->left_ankle_roll_servo_id=data[WALK_L_ANKLE_ROLL_SERVO_ID-eeprom_offset];
-  if(ram_in_range(module->ram_base_address+WALK_L_SHOULDER_PITCH_SERVO_ID,address,length))
+  if(ram_in_range(module->eeprom_base_address+WALK_L_SHOULDER_PITCH_SERVO_ID,address,length))
     module->left_shoulder_pitch_servo_id=data[WALK_L_SHOULDER_PITCH_SERVO_ID-eeprom_offset];
   for(i=0;i<EEPROM_WALK_LENGTH;i++)
     if(ram_in_range(module->eeprom_base_address+i,address,length))
@@ -209,7 +209,14 @@ void walk_pre_process(void *module)
   float x_move_l,y_move_l,z_move_l,a_move_l,b_move_l,c_move_l;
   float pelvis_offset_r,pelvis_offset_l;
   float angle[14],ep[12];
+  static unsigned char first=0x01;
 
+  if(first==0x01)
+  {
+    first=0x00;
+    update_param_time(walk);
+    update_param_move(walk);
+  }
   if(walk->time==0)
   {
     update_param_time(walk);
@@ -431,7 +438,7 @@ void walk_set_period(void *module,unsigned short int period_ms)
 {
   TWalkMModule *walk=(TWalkMModule *)module;
 
-  walk->walk_period=((float)period_ms)/1000000.0;
+  walk->walk_period=((float)period_ms);
 }
 
 void walk_set_module(void *module,unsigned char servo_id)
@@ -461,11 +468,6 @@ unsigned char walk_init(TWalkMModule *walk,TMemory *memory,unsigned short int ra
   walk->running=0x00;
   walk->leg_ik_function=0x00000000;
 
-//  update_param_time(walk);
-//  update_param_move(walk);
-
-//  walk_pre_process(walk);
-
   /* initialize the motion module */
   mmodule_init(&walk->mmodule);
   walk->mmodule.id=MM_WALK;