about image size

its really a good plugin. but i face a problem.

i use it both localhost and real server.

in localhost its show 10 predefine size of image in wiged are. but on real server its show only 8 predefine option of image.

My Question is how is it possible !

2 different size that show in predefine area is
featured(365×250)
tile-thumb(235×245)

i also copy plugin file into local server to real server. but this 2 different size is not show in real server.

any one can please find the cause of this !