Checkbox in flash mx 2004

[size=3]I tried to use some [/size][size=3]checkbox-es in a flash mx 2004 file; in swf I obtained 2 versions like in the image:

why?[/size]

I am getting the same thing with only one version, the second one.
I tried using it in another movie and i get the first version but when i try using it in the movie i want i get the second version. :hair: