Many thanks @Travis7s and @Slashee_the_Cow, the problem is fixed, highly appreciated.
Now I have another issue, my printer is (WANHAO Duplicator i3 Mini) and the size of the build plate is (16 * 24 cm), but when I print any 3D model , the maximum print size which I get is (9 * 10 cm), how can I print my 3D models to the maximum size of my printers build plate ?